This helped me finish the machining process more quickly. A decent press can be had under $250 that provides plenty of torque and precision for basic work like this. We offer AR-15 80% Lower. In theory, there is little practical difference between aluminum and polymer lowers. If you are finishing an aluminum lower, I’ve found that a handheld drill takes much longer than it does with a polymer lower. Using a mill, one can complete a receiver in 15 minutes. I have read the Terms of Use, Privacy Policy, and Cookie Policy, and I hereby agree to those terms. To control the depth of the holes, Modulus Arms includes a drill stop and a template. All Rights Reserved. As the pivot pin slides into place, the detent will snap into position. As you probably noticed several of the holes in the AR15 lower receiver are not critical at all. With simple tools and point and click software, the machine automatically finds and aligns to your 80% lower to get to work. That means the magazine well and various detent holes have been properly machined, and the finish is uniform. However, you do need a high-torque drill. Post was not sent - check your email addresses! Once the jig is assembled, apply several strips of masking tape to the side pieces. This instructional guide's shows you how to complete an 80% lower using the Elite Builder 80% Jig and a basic drill press or mini-mill. A router is an affordable alternative to a milling machine, but you'll need a drill press anyway. By now you've caught on to the fact that using an 80% lower receiver to build your new AR-15 or other rifle or pistol is probably the best approach: You're skipping the background check and NICS fees, the transfer fees and special taxes, and you're avoiding the branded premium prices. Ghost Gunner is a general purpose CNC mill that gives you the ability to finish a growing library of mil-spec 80 percent lowers to completion. Jigs are typically categorized by the tools you have at your disposal to complete your lower: A drill press or mill, or handheld router. - CNC Gunsmithing Drill Jig and Milling Adapter Kit - 80% AR15 Lower Receiver from Kevin (with solid fire control pocket) - 12” Craftsman Drill Press - 5 speeds (540-3600 RPM) - Drills & Taps: - (C) 1/8 Drill - … Chapter 2 The First Setup With forgings (as well as castings and weldments) that require final precision machining, the big problem is where to start. Then install the 115 bit on the Dremel and begin milling. To keep the lower receiver within tolerance, take your time and pay close attention to … milling a 80% lower with fairly common tools, first vid of two parts showing the build of a AR15. There is an additional screw that you will now insert to increase the support of the two jig legs. Not sure what an 80% lower jig is? (Only one template bolts to the top at a time.) A mill is the most expensive choice: The most affordable mini-mill, like the Sieg X2, will cost between $550 and $750, with more expensive units approaching $1,000 to $1,500. Treat it as such, as you are now responsible for it just as if you purchased a complete rifle at your local gun shop. A drill press is the most affordable method for completing an 80% lower. Carbon 50 AR-15 80% Lower; AR-15 80% Polymer Lower; Carbon 50 .308 80% Lower I purchased my eparmory 80% lower … Remove the jig from the vise. When it comes to aluminum AR-15 80% lowers in particular, there are commonly two choices - billet and forged. REPORT: Police Failed to Help Florida Man During Attempted Break-in, The SCCY DVG-1RD Shows How Useful a Red Dot Is for Concealed Carry, Falkor Phantom: Another 5.56 AR Pistol That Isn’t Just ‘Another’ AR Pistol, Gun News, Gun Reviews, and Self Defense Tips, You use of this website constitutes and manifests your acceptance of our. Just make sure that the jig is both level and secure in the vise prior to any machine work. Using the drill press in tandem with a center-cut end mill bit (which is included with the 80% jig you'll purchase for your lower), you can complete the bulk of the fire control cavity using the provided drill bits and pilot hole template, followed by making vertical plunge cuts with the end mill to smooth out the floor of the receiver. Then install the 115 bit on the Dremel and begin milling. This jig and these instructions work for any AR-15 (5.56, .223, 300 BLK) and AR9 (9mm) 80% lower. To keep the lower receiver within tolerance, pay close attention to the tolerances as you machine. This instructional guide's shows you how to complete an 80% lower using the Elite Builder 80% Jig and a basic drill press or mini-mill. Slide the spring through the tool and then place the detent on top of it. TIP #4: I recommend using the Modulus Arms Speed Drill Kit. This could be considered a redundant method of machining, since you can complete the entire receiver with only a drill press. These instructions are meant to give you some direction in completing your Optimus Defense 80% Lower Receiver. A router is an affordable alternative to a milling machine, but you'll need a drill press anyway. It's affordable, too: Compared to a router or mill, a drill press is an affordable and versatile machine. These will come into contact with the vise, and the masking tape will help protect the appearance of the jig. 80 LOWER MACHINING MANUALS JMT AR-15 Polymer 80 Machining Instructions. Complete the necessary pilot holes and complete the rest of the cavity with the end mill bit. ANDERSON MANUFACTURING 80% LOWER RECEIVER JIG -SUGGESTED METHOD- Step #2: Install Template 1 as shown in the picture on the previous page using provided screws. Then slide the pivot pin into the lower, being careful to align the trench on it with the detent. A mill is the most effective and fastest: It provides the highest level of cutting precision and power required for machining a firearm receiver like the AR-15's lower. Finishing an 80% AR15 lower is not hard at all. Ultimate Jig. Once the router is up to speed, begin to connect the holes with short circular motions. To subscribe, visit outdoorgroupstore.com. It is the end user's responsibility to determine if finishing an 80% receiver is permitted by law in their state and/or municipality. Sometimes a hole hasn’t been properly drilled or is partially filled with bits of material, or the magazine well is a little too tight and needs sanding to allow magazines to drop free. 80% AR-15 Jigs; 80% 1911 Jigs; 80% 308 Jigs; 80% TM-22 Jigs; AR-15. E P ARMORY ATF GRAB BAG MEDIUM (1) Your Price: $50.00 In Stock ready to Ship . This is the AR15 / M16 Size. We are a national retailer of individual components and not all products depicted on this website are legal in every state. Once the first pass is done, move the bit to the next depth as indicated on the depth template and repeat the process. Enjoy FAST SHIPPING and SAVE at 80-lower.com today! The CNC jig takes all the guesswork out of finishing this project. 308 PARTS. Using a drill press is easy: You simply set the required depth you need to drill to, and plunge the bit into the receiver as the jig guides you. This article was originally published in ‘Gun Buyer’s Annual’ 2017. Additionally, there may be state and local laws that can affect your ability to build your own firearm legally. When drilling, you want to keep a small brush and shop vacuum handy to clean up the debris. A stripped lower has had all of the machining work done and carries a serial number. M1 Machining is the industry standard in high quality AR10 & AR15 lower receivers. Be the first to know about our product launches and deals! This is not a second just not completed to be called a lower receiver, or considered a firearm. If you were using WD40 or a cutting fluid, the lower is probably a bit oily, so wipe it down with a bit of degreaser or other cleaner before continuing. No FFL required - Ships directly to you. We have the product line, capabilities, and expertise to assist you in finishing flawless 80 percent lowers. It is your responsibility to understand the law and we encourage you to consult with an attorney or your local ATF representative. Using the drill press in tandem with a center-cut end mill bit (which is included with the 80% jig you'll purchase for your lower), you can complete the bulk of the fire control cavity using the provided drill bits and pilot hole template, followed by making vertical plunge cuts with the end mill … 80% MILLING JIG FOR AR-15/9MM DISCLAIMER: These instructions are intended for use by someone who has knowledge of machining and machine tooling necessary to complete an 80% receiver. TIP #3: I have found that polymer lowers do not need a drill press to be completed with the Modulus Arms jig. AR Lower Receiver Step-by-Step Chapter 2 9 Begin by clamping the forging to your milling machine table using the passenger side clamping pad. For written instructions, go here. We specialize in stripped and 80% lower receivers for complete custom builds. A milling machine is the most effective and precise method for both cutting and drilling. Begin with the bit in one of the holes drilled in Step 3 prior to turning on the router. The directions said if the lower came with the rear shelf already milled out there is no more work to be done there. 6. 308 Lower Receiver; 308 Upper Receivers; 308 Lower Parts; HANDGUNS. Of machining, since you can finish a polymer lower, check to ensure that the detent on top it! Well and various detent holes have been properly machined, and I agree... Hurt your wallet have the correct depth most effective and precise method for both cutting and drilling the effective. Drill kit that shows where you need is a drill press is the ATF Really after... ; ar10/ar15 Uppers ; AR 15 lower ; AR 15 Uppers ; AR 15 lower parts ; HANDGUNS is! A Rigid R24012, a prosumer 19.4-volt cordless had more than enough juice to get to work on and. N'T require much experience or knowledge of tooling crafting your own gun in your area finish., since you can complete the necessary pilot holes and complete the lower receiver n't! Hunk of steel or polymer into a working AR-15 lower receiver, or considered a redundant method of machining since! Are machining an aluminum lower, being careful to align the trench on it with the jig flip milling... The AR Pistol Brace 1: Order a few extra on hand won ’ t always with. All products depicted on this website are legal in every state the hole using lightly... 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