Thanks. To start off, you need to understand how to assemble your jig correctly. At 5D Tactical, we provide our clients with a range of AR-15 and AR-308 build parts like the universal 80% lower Ensure that the jig assembly is level and spray WD-40 into the large guide hole and insert 3 /8” drill bit. 80% Lower Jigs. The Router Jig PRO can be purchased as AR-15/AR-9 Only, or you can add a Conversion Kit for use with our AR-308 80% Lower Receivers. Let's compare tooling: AGT Also make sure that the holes in the rear of the guide plate align with the buffer plate, and then loosely install the jig screws. The same goes for lower parts kit, upper receivers and other parts that should work right out of the box. Follow the instructions provided to loosely thread the buffer adapter into the receiver until it’s pressed against the back of the receiver. Orders are shipping in 4 to 8 weeks. However, these modifications are not just limited to the lower receiver, but it’s the true nature of all AR 10 .308 builds. But, both give you a look and feel of a refined product that was designed and built for longevity. How to install the 5D Tactical Universal Router Adapter. 5D Tactical Info – 80% Lowers and Jigs. This will free up your time as you work on the other assignments. If looking at other brands, are any built more sturdy than 5D's? After this, set the guide plate and lower receiver assembly atop the side plates and loosely thread the jig screws and then tighten. Change ), You are commenting using your Twitter account. The problem is, without a basic understanding of how AR 10s work and the right parts for building an AR 10 .308, you could as well end up with an expensive but non-functional gun. Align your lower receiver with the takedown adapter and pass the correct takedown pin through the receiver and adapter. can seem challenging, but with the right parts and components, you can easily build your own AR 308 rifle at home. Both the jig and lower must match to ensure an accurate build. At 5D Tactical, we provide our clients with a range of AR-15 and AR-308 build parts like the universal 80% lower Router Jig PRO to ensure 80 LOWER MACHINING MANUALS JMT AR-15 Polymer 80 Machining Instructions. 1.1 Page 1 80% A rms AR-15 Jig manual Thank you for purchasing our AR-­‐15 jig. The 5D Tactical Router Jig PRO is a truly universal 80% lower jig, which is guaranteed to be compatible with all lower receiver styles, regardless of exterior dimensions. When selecting a AR-308 lower receiver for building an AR 10 .308, you must decide which type to choose for your custom home build. PART 1: JIG ASSEMBLY. These parts include the trigger, the trigger springs, and the safety, which can be easily swapped between the AR-10 .308 and the AR-15. 5D TACTICAL ROUTER JIG PRO - UNIVERSAL THE AR-15/AR-9/AR-45 ROUTER JIG PRO - UNIVERSAL 80% LOWER RECEIVER JIG https://www.5dtactical.com/ar-15-80-lower-jig-p/40105.htm Jig Manual Ver. Assemble everything as required and ensure that all parts fit accurately to avoid functional issues. But how can you effectively use our router jig to ensure a perfect finish? It’s important, though, to conduct some research. What does this mean? Has anyone else had this happen and 5D replaced it? Highly recommended. Before diving into the details of. End Mill Dimensions: 5/16" Diameter 1/2" Length Of Cut 1/4" Reduced Shank For Router 3-3/4" Over All Length "Zrn" Coated For Aluminum. $ 39.99 $ 49.99. Most AR-308 80 lower receivers in the market today are designed to work with components from DPMS, Aero Precision, CMMG and other smaller companies that market their AR-308 components as DPMS compatible. Jig replacement parts are also available for purchase. Follow these basic beginner steps while also referring to the provided assembly instructions that come with your upper receiver build kit. Like an AR-15, you can also build your own AR-308 at home. To go on with your lower receiver build, you’ll need a matching 80% 308 lower router jig to help you transform the lower into a firearm. Short video of AR lower build using the very easy rimi use 5D Tactical Jig. 5D Tactical Router Jig PRO Instructions . When you start drilling, apply moderate pressure until the drill penetrates the right side wall and continue drilling through the left side. Their massive side plates are impressive compared to 80 Percent Arms. What follows is the detailed process (one of many available) to finish your AR15 or AR10 80% Lower Receiver into a ready to use part. A good gunsmith kit should include a genuine lower receiver, upper receiver, barrel nut threads, lower receiver extension threads, trigger group and all the other parts needed to assemble the rifle. If you’re looking for quality parts and components for. Start drill and apply firm pressure. It just needs a little surgery, some testosterone, and well…you get the point. Recommended Tools for Your AR-10 .308 Assembly. That's just what we did when we designed our jigs and lowers from the ground up to include all the features we believe are necessary to build a great product. Considering that none of the major AR-308 manufacturers sell 80% lower receivers, it’s up to companies in the 80% lower industry to develop compatible products and parts. ar-15 easy jig® manual ® warnings and safety notice read all instructions and warnings before using the product. Router Jig PRO from 5D Tactical delivers the best, quality finished results for your next custom AR build. Be sure to check if the kit has everything needed to complete the lower. For the buffer tube assembly and stock, you can purchase them anywhere with little concern about fitment issues. DPMS pattern AR 10 .308 80% lower receivers do come with more options when you’re looking for parts needed to assemble your rifle. AR 10/.308s are different in that there is no standardization for construction of the rifle and different brands have different iterations of the .308 platform design. It’s now time to tighten the jig screws to secure the buffer plate and takedown adapter. The gray buffer plate provided is for AR-15/AR-9 receivers while the black buffer plates are for .308/AR-10 receivers. After this, spray WD-40 into both of the small guide holes and insert 5/32” drill bit into either of the remaining guide holes. Buying the right parts for your AR 10 .308 custom build is perhaps the most important step. This tool is simply the best tool for your AR15 lower receiver jig … Shop 5D Tactical for the best parts to complete your custom AR build! SHOP JMT; JMT PRODUCTS. Review the 80% lower jig instructions carefully to avoid any damage. Both the jig and lower must match to ensure an accurate build. The weight of the 5D Tactical is more substantial due to the large sited plates that they use. Due to the small difference between lower receivers, there are a few parts that are only compatible with AR10 lowers. 80% Lower Jigs, Jig Parts & Conversion Kits. Unfortunately, many of these parts are not interchangeable between AR 10 .308 rifles. Make sure to follow the guidelines to the letter. Considering that the DPMS platform is more common today, and the parts and components offered are more modular, it’s easier for you to build your rifle based on the DPMS platform for your AR-308 build. The parts you’ll need include: Once you have all the parts ready, inspect each of them and do a test run to be sure that all the parts fit as expected. If you’re looking for quality parts and components for building an AR 10 .308, 5D Tactical is your trusted source for AR 10 .308 upper and lower receivers. Take any two AR 15s and the chances are the majority of the parts can be interchanged. Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account. Make sure to periodically pull the drill out of the guide hole to clear any chips. Slowly nibble away at the lower receiver, and in case you start experiencing chattering, you’ll want to slow down and take shallower depths of cut. ( Log Out /  For the final drilling process, clamp your jig assembly in the vise by the edges of the side plates, with the right side facing up. 5D Tactical ReadyMILL™ K ..308/AR-10 C. .. (4) Router Adapter 4. Some of the comments on an AR15 site’s DIY Build forum says the $280 5D Tactical Universal AR15/AR10 is better than the $180 Juggernaut Tactical jig. do not use this product if you do not understand the instructions and warnings. receiver take down with guide holes in jig plate. Both jigs look alike and have similar characteristics. The Router Jig PRO can be purchased as AR-15/AR-9 Only, or you can add a Conversion Kit for use with our AR-308 80% Lower Receivers. The rifle is chambered in the .308 caliber round and has more recoil than the .223 or 5.56MM typically used in an AR-15 due to its full powered round. AR 10 Lower Parts Kit Due to the small difference between lower receivers, there are … You don’t have to buy expensive parts or a complete rifle. Don’t insert or remove the end mill while the router is spinning. Apply WD-40 when necessary. 80% Arms is dedicated to providing the highest quality 80% lowers and jigs on the market. Our Phone Staff is working on fulfilling your orders! With so many different types of .308 ARs out there, it can be hard to know which parts you need for the type of gun that you want to build. The average person with the proper tools and some mechanical skills can get the job done in about an hour or less. Here’s a complete list of .308 AR specific parts that you’ll need for your custom build: Other parts you’ll need that also consist of AR-15 parts include: Building an AR 10 .308 rifle at home is easy when you have all the right parts. News, updates and in-depth AR-15 and AR-308 80% lower receiver and universal 80% lower receiver jig product information from 5D Tactical. He says use a drill press. Drill Takedown Adapter B. Just make sure you’re grasping the guide plate while tightening the screws, after which you need to orient the side plates, observing left and right with the flat sides facing out. Instructions for finishing an 80% lower with the 5D Tactical Router Jig PRO. ( Log Out /  With so many different types of .308 ARs out there, it can be hard to know which parts you need for the type of gun that you want to build. There are different manufacturers selling kits that provide the core parts of the AR 10 .308 which can then be combined with third-party parts to build the perfect rifle. Page 3 ASSEMBLY Thank you for your Router Jig Pro purchase. Most .308 80% lowers available on the market are manufactured to be compatible with the DPMS Gen 1 platform. You should know that AR-308 lower receivers are a bit more complicated than AR-15 lowers as parts sourced from different manufacturers will not fit together like with the AR-15. The AR-308 and AR-10 are magazine fed, semi-automatic and modular rifles. 3. 5D Tactical supplies essential equipment for building your own AR-15, AR-9 or AR-308/AR-10 firearms, including upper receivers and 80 percent lower receivers, 80% lower jigs, tools, and jig replacement parts. Ensure that your router base lock is tight and functioning properly. Otherwise, you will make a costly mistake. 1-2. Most AR-308 80 lower receivers in the market today are designed to work with components from DPMS, Aero Precision, CMMG and other smaller companies that market their AR-308 components as DPMS compatible. failure to read these instructions and to follow these warnings may result in serious injury or I have to try it for myself and I'm looking forward to "cutting chips" when it arrives. In today’s market, you will find two main patterns of the .308 rifle: the Armalite pattern and the DPMS pattern. Although the rifle is less popular than the lighter AR-15 and was never adopted by the U.S. Military, the AR-308 still remains a great pick for custom build gunsmiths. If you decide to build your AR-308 using an 80% lower receiver, you’ll also need a specific router jig for the custom build. There are two ways to. Considering that none of the major AR-308 manufacturers sell 80% lower receivers, it’s up to companies in the 80% lower industry to develop compatible products and parts. Most of the tools you’ll need for your AR 308 assembly as you learn and practice how to build an AR 308 are tools that you already have in your home garage or workshop. Only two holes are needed, one 3/8″ hole to depth (which requires accurate placement of a drill stop using the built-in depth guides) and one 5/16″ trigger slot pilot hole (which needs to be prevented from drilling into the built-in trigger guard, if present). How to assemble the 5D Tactical Router Jig. As outlined in the 80% lower jig instructions, don’t start the drill until you’re sure the bit is fully inserted. The recommended tools include: Prepare the AR 308 receiver by mounting it on your vise, Install the barrel in the DPMS upper receiver, Be sure to clean the barrel extension and the mating hole, Apply grease to the threads and install the AR 308 barrel nut, Tighten the barrel nut correctly while maintaining proper alignment with the gas tube, if applicable, Install the AR 308 gas tube correctly (Actual installation will happen when the gas block is installed), Install the AR 308 gas block while checking the orientation of the holes in the gas tube, Install the free float handguard, aligning the Picatinny rail with the rail of the upper receiver, Install the AR 308 bolt carrier group and charging handle, Building a DPMS AR 308 lower receiver from parts will also need some work and attention to small details. Keep the router adapter flat against the router guide plate at all times. The average person with the proper tools and some mechanical skills can get the job done in about an hour or less. Install the AR 308 magazine catch into the recess on the left of the receiver, Install the AR 308 bolt catch spring and then the buffer in the lower receiver, Install the AR 308 rear takedown pin, safety selector, and the pistol grip, Install the AR 308 trigger using a fire control group of modular design. The AR-15/AR-9 Router Jig PRO by 5D Tactical is the fastest, easiest and most durable 80% lower jig ever created. 5D Tactical Jig – Experienced User Drilling the pilot holes was about the same as every other jig; just a lot fewer were required. Even though the jig is lifetime, it's pretty clear the end mill isn't. After that, you can now pick up an assembled upper receiver and lower parts kit from your selected manufacturer. PREMIUM UPGRADE 5D TACTICAL PRO COMPATIBLE HIGH PERFORMANCE THERMAL FIT READY MILL COMPATIBLE REPLACEMENT "ZrN" COATED HEAT SHRINK END MILL. Take any two AR 15s and the chances are the majority of the parts can be interchanged. You, therefore, need parts that are DPMS compatible as they’re most likely to fit your lower receiver with or without slight modifications. Most .308 80% lowers available on the market are manufactured to be compatible with the DPMS Gen 1 platform. First, clean the surface of the 80% lower receiver and apply masking tape to the sides before applying the buffer plate to the back of the receiver. Repeat the same process for the remaining small hole. lower receiver: Purchase a lower parts kits specifically for the AR 308 or buy parts individually. , there are a few critical things that you should know. He says use a drill press. Router A..Guide Plate J ..AR-15/AR-9 2. Router Jig PRO to ensure easy and fast finishing of your lower receivers. Jig Instructions; Best Sellers! Not only do you need parts that fit, but also a gun that runs and functions reliably. There is no doubt that the AR 10 .308 is one of the best rifles out there in terms of power and range. Both patterns can make a good rifle, but the DPMS comes with an advantage due to availability of parts, some of which are interchangeable with the AR-15. In today’s market, you will find two main patterns of the .308 rifle: the Armalite pattern and the DPMS pattern. If the router depth moves while milling, the end mill or the receiver can be damaged. The problem is, without a basic understanding of how AR 10s work and the right parts for, , you could as well end up with an expensive but non-functional gun. Use the 5/32” drill and guide holes in the jig to peck drill the trigger and hammer pin holes. Drill until the drill bit exits the bottom of the lower receiver and then uninstall the drill jig guide by removing the two jig screws. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. As earlier mentioned, building an AR 10 .308 rifle from a .308 80% lower receiver is perhaps the easiest path to take. It was 5D Tactical's end/finishing mill. You should know that AR-308 lower receivers are a bit more complicated than AR-15 lowers as parts sourced from different manufacturers will not fit together like with the AR-15. 80% Lower Jig Instructions Hendricks 0 80 Percent Lower Receiver Blog, Instructions And Guides For Lowers, Updated: 8/23/2020. . Once you’ve completed your final drilling, it’s time to remove your lower receiver from the jig assembly. Spray WD-40 into Hole #3 of Drill Guide. Description: The 5D Tactical AR-15/AR-9 Router Jig PRO is guaranteed universal for all billet, forged and polymer AR-15 or AR-9 80% Lowers. Parts that are not compatible in any way include: Buying the right parts for your AR 10 .308 custom build is perhaps the most important step. Excellent article just what I needed. Building Your AR 10 .308 Using a Gunsmith Kit. AR 10 .308 Internal Parts are Not Always Compatible. What follows is the detailed process (one of many available) to finish your AR15 or AR10 80% Lower Receiver into a ready to use part. Interestingly, he has the original 5D Tactical jig and likes new jig much better: 1. Because of the different AR 10 .308  rifle patterns, you’ll come across parts for both DPMS and Armalite, and upper receivers for each. If you have built an AR-15, you will agree that parts compatibility is one of the benefits of building one. But, over the last year I've kinda became a collector of jigs. The popularity of quality matched receivers from companies and 80% lower receivers as the platform of choice when it comes to building an AR 10 .308 rifle has gotten a lot of people interested in do-it-yourself AR-10 .308 rifle builds. According to 5D Tactical, a company that provides firearms enthusiasts the capability to easily and quickly finish 80% lower receivers for their AR 10 .308 builds, learning how to build an AR 308 can seem challenging, but with the right parts and components, you can easily build your own AR 308 rifle at home. https://info.5dtactical.com/2018/01/10/how-to-guide-for-building-an-ar-308 The 5D Tactical jig system shares some similarities with other router-based jigs but also takes a very unique approach to the way the jig … Insert 5/16” drill bit into hole. Seems his main gripes are the crappy instructions and some misalignment issues with the side holes. Overall, I learned a l… Apply the Buffer Plate to the back of the receiver as shown. 5D Tactical The 5D Tactical Multi-Platform Router Jig PRO is the gold standard for finishing AR15, AR9, and DPMS AR10 (308) 80% lower receivers. The 5D Tactical jig is the third (that I'm aware of) router-based 80% lower completion jig on the market, preceded by the 80% Arms Easy Jig and the Modulus Arms Jig(s). Building a DPMS AR 308 lower receiver from parts will also need some work and attention to small details. For home builders interested in learning how to build an AR 308, it means you can’t go ahead with purchasing parts without doing some research. If you’re using a variable speed router, set to the highest speed setting. 21/64” Drill Bit L .. Carbon 50 AR-15 80% Lower; AR-15 80% Polymer Lower; Carbon 50 .308 80% Lower Change ), from an 80% lower receiver is easy. Unlike the AR-15 rifle which is pretty well standardized among various manufacturers, the .308 platform is not standardized. Change ), You are commenting using your Facebook account. Seems his main gripes are the crappy instructions and some misalignment issues with the side holes. The 5D Tactical Router Jig PRO is a truly universal 80% lower jig, which is guaranteed to be compatible with all lower receiver styles, regardless of exterior dimensions. 2. This will free up your time as you work on the other assignments. The larger and heavier support bases were easier to clamp and more secure. I am one of the first to admit that when God was handing out the Handyman gene, I was skipped. It becomes even easier when you do your homework and know where to source all the components needed to complete your, Most of the tools you’ll need for your AR 308 assembly as you learn and practice. "ZrN' coatings offer extreme lubricity and hardness extending tool life. Get the Best Custom AR Router Jig from 5D Tactical. There are three main milling steps in the instructions which start with installing the short guide pins to the router adapter using the provided guide pin screws and 7/64” Allen wrench, eventually working your way up to the medium and long guide pins to finish your milling process. Make sure to follow the steps provided with your 80% lower jig instructions so you can do it correctly. However, this is not so with the AR 308. ( Log Out /  See the Description section below for more in-depth information and review the Router Jig Instructions for a complete overview of the process. See the Description section below for more in-depth information and review the Router Jig Instructions for a complete overview of the process. As you learn how to build an AR 308, it’s important to understand that minor modifications will most likely be needed during the build process. If you want to take the pain out of selecting and buying parts for your custom build, you should opt for a complete gunsmith kit that comes with the bulk of the common parts you need for. Sometimes when you want something done right, you have to build it yourself. rifle from a .308 80% lower receiver is perhaps the easiest path to take. Please also reference the written instruction manual prior to and during jig use! Begin drilling while making sure that the drill bit is kept straight and perpendicular to the receiver. When the package from 5D Tactical arrived, it contained the jig, several drill bits, and two specially designed end-mills for the included Rigid router and an 80% lower blank. Stop drilling when the drill … Only start the drill when you’re sure that the bit is fully inserted into the guide hole. There are two ways to building an AR 10 .308 lower receiver: Purchase a lower parts kits specifically for the AR 308 or buy parts individually. 2-3: Prior to drilling, ensure the Jig Assembly is level. Direct and to the point. There is no doubt that the AR 10 .308 is one of the best rifles out there in terms of power and range. View all Items. When assembling an AR 10 .308 for the first time, just make sure to keep the Dremel handy, and you’ll have no problems. Opting to use an 80% lower for your custom build gives you the freedom to enjoy an easier and faster build with fewer frustrations. To ensure smoother drilling, spray WD-40 into the router drill attachment and insert a 21/64” drill bit. Remember to apply WD-40 sparingly and remove chips frequently. DPMS pattern AR 10 .308 80% lower receivers do come with more options when you’re looking for parts needed to assemble your rifle. If you decide to build your AR-308 using an 80% lower receiver, you’ll also need a specific router jig for the custom build. The quality of finished results possible with the Router Jig PRO cannot be attained by any other jig. Tools and accessories needed for finishing an 80% lower with our Jig. Place the first drill plate on top of the jig and secure with 1/4-20 bolts provided. We will resume phone support soon as we can. Make sure to clamp your jig assembly securely in a vise by the notches provided in the side plates. After completing that step, loosely install the takedown adapter to the guide plate using the provided jig screws while ensuring that you’re using the right colored adapters for your specific AR build. What ATF Regulations Mean for You as a Gun Owner. Because of the different AR 10 .308  rifle patterns, you’ll come across parts for both DPMS and Armalite, and upper receivers for each. Unlike the AR-15 rifle which is pretty well standardized among various manufacturers, the .308 platform is not standardized. This precision self-­‐aligning jig will allow you to finish your 80% Arms and other 80% lowers using only a drill press and a few common tools. 5/16" "ZrN" Coated Carbide End Mill Compatible with Easy Jig Gen 2, 5D Tactical Jigs. Start by removing the buffer adapter, loosen or completely remove the buffer plate, remove the takedown pin and then remove your finished receiver from the Router Jig PRO. In addition, we offer 80% Lower Jig Conversion Kits as a cost saving option as opposed to purchasing two separate complete 5D Tactical jigs. The 5D Tactical Router Jig PRO is a truly universal 80% lower jig, which is guaranteed to be compatible with all lower receiver styles, regardless of exterior dimensions. 5D Tactical has the Universal Jig in either AR-15 or .308, as well as, a multiplatform (AR-15, AR-9 and .308). I haven't contacted them about it because I don't expect they'll warranty it. Ejection Port Door (unless you’re running a slick side upper), Muzzle device that’s threaded ⅝” x 24, for a .30 caliber, Specific LPKs and triggers for the .308 ARs, Sighting systems, mounts, optics, backups/flips, red dots, etc, rifle at home is easy when you have all the right parts. Unfortunately, many of these parts are not interchangeable between AR 10 .308 rifles. , 5D Tactical is your trusted source for AR 10 .308 upper and lower receivers. If you have built an AR-15, you will agree that parts compatibility is one of the benefits of building one. There are different manufacturers selling kits that provide the core parts of the AR 10 .308 which can then be combined with third-party parts to build the perfect rifle. are tools that you already have in your home garage or workshop. Apply moderate pressure when drilling and drill until the bit penetrates the right side of the wall and continue doing so through the left side wall. 5D Tactical Router Jig PRO Instructions . We are backordered and our shop is working 24/7. The recommended tools include: If you’ve decided to assemble an AR 308 upper receiver from parts, you will have to follow a strict build procedure to ensure that everything works fine. In fact, building an AR 10 .308 from an 80% lower receiver is easy. When purchasing an 80% lower receiver for building an AR 10 .308, make sure to purchase a compatible 80% lower jig with the right tools. , it’s important to understand that minor modifications will most likely be needed during the build process. 80% Lower Jig Instructions Hendricks 0 80 Percent Lower Receiver Blog, Instructions And Guides For Lowers, Updated: 8/23/2020. With our Router Jig PRO, which is considered the most advanced 80% lower jig on the market today, even beginners can expect to finish their lowers in as fast as 45 minutes or less time. .. Router Adapter 3. Once you have completed setting up your jig assembly, the next step is drilling your lower receiver. Change ), You are commenting using your Google account. If you get stuck along the way, you can always ask for help or watch tutorial videos from parts manufacturers. I'm placing an order for the 5D Tactical Jig, the 25 minute completion time video interests me. , you must decide which type to choose for your custom home build. As you learn. The same goes for lower parts kit, upper receivers and other parts that should work right out of the box. The end mill shank doesn't make contact with … See more ideas about 80 lower jig, Tactical, Router jig. DESIGNED TO BE COMPATIBLE WITH THESE JIGS: 80% Gen-2 (any version) 5D Tactical Universal AR15 5D Tactical Universal AR10, .308. Some kits may not include a trigger and associated parts like the fire control group. Do not start drill until bit is fully inserted. Not only do you need parts that fit, but also a gun that runs and functions reliably. Some of the comments on an AR15 site’s DIY Build forum says the $280 5D Tactical Universal AR15/AR10 is better than the $180 Juggernaut Tactical jig. What does this mean? I cannot say enough positive about my Modulus Arms Jig and the support they've offered on this Forum. If you buy a Universal Jig, it is essentially a multiplatform jig that only has the parts that are specific for the lower you are completing. Once you’ve decided what pattern lower to use for your custom build project at home, you’ll have to choose build parts that are compatible with your type of pattern lower. I’ve assembled several AR-15 rifles from parts kits and a stripped receiver. Before diving into the details of how to build an AR-308, there are a few critical things that you should know. Originally built by Eugene Stoner as a combat rifle, the semi-automatic .308 is a popular pick among gun enthusiasts looking for a rifle that’s suited for long range shooting and hunting. You’ll also want to avoid exerting excessive pressure or abruptly pulling the router. 5D Tactical jigs. Peck … The popularity of quality matched receivers from companies and 80% lower receivers as the platform of choice when it comes to building an AR 10 .308 rifle has gotten a lot of people interested in do-it-yourself AR-10 .308 rifle builds.