The AR-15 was first built by ArmaLite as a selective fire rifle for the United States armed forces. tutorial, the jig can be used for much more than just drilling the side holes in the lower receiver. The select-fire AR-15 entered the US military system as the M16 rifle. To do this I turned the jig upside-down and set it on the edge of the drill press table. In Stock Style: Mil-Spec Details; Q&A (3) Reviews (6) 3.7. II. Mfr Part: MSFCG. III. Related Products. Looking for downloadable 3D printing models, designs, and CAD files? Mfr Part: 709100021520. 3.3.2.3 Fire control selector. Join the GrabCAD Community to get access to 2.5 million free CAD files from the largest collection of professional designers, engineers, manufacturers, and students on the planet. This allowance will be machined during the finish pass. spec. This compact jig assembly is designed specifically for 80% mil. hammer when the fire control selector is in the “AUTO” position and the hammer is cocked by the bolt carrier. The automatic sear shall restrain the hammer until the sear is tripped by the forward motion of the bolt carrier. Lower Parts Kit M16. Leave an allowance of about 0.010” to 0.020” around the pocket. M16, AR-15, M-16, MilSpec quality parts Made in the U.S.A << Back ... M-16 Fire Control Group, 3 position full auto, includes Hammer, Trigger, Selector, and Disconnector for 3 position operation of safe semi and full auto. 5) The fire control well bottom has a thickness of 0.125" (see Fire Control Well). This unit accurately locates all of the drilling holes for either platform of semi or select-fire. 100-500-152WB AR-15 Fire Control Group Stamped Disconnector. AR-15 AK-47 Handgun Precision Rifles Armory Training Competitive Shooting General Outdoors Archery Hometown Industry About AR15.COM AR15.COM is the world’s largest firearm community and is a gathering place for firearm enthusiasts of all types. There is still more than enough slack so that the magazine release button moves easily. Do not go more than 1/4 of a turn without checking to insure the tap and jig are both still level. Size) Depths: Trigger / Fire Control Pocket 1.250” Deep Shelf Pocket 0.630” Deep Other Materials Needed: Drill press with adjustable crank table or feed lever for milling Safety goggles for eye protection Cutting fluid such as SafeTap Ultima when milling (A lubricant receivers that are to end up with the M16 fire control pocket/cavity (which almost all end-users prefer currently) for use by Type 07 FFL's/Class 2 SOT's. Since a .318" endmill is an unusual size, the blueprints show that the receiver was built using a magazine release button width of 5/16" (.3125") - a standard end mill diameter. Visually rough out the large pocket of the fire control pocket, but not the rear slot, to a depth of 1.250”. The fire control selector shall have three positions; safe, semi-automatic and automatic AR-15 Fire Control Group Laser Cut Disconnector. Add to Cart. Because of financial problems, ArmaLite sold the AR-15 design to Colt. If one were to take an “80% lower”, or any home-built, self-made lower for that matter, and mill the interior of the fire control pocket to M16 dimensions, as opposed to AR15 dimensions, WITHOUT the auto sear hole, could you get yourself in any sort of legal trouble? just like my AR308 lower, 1911 frame models aren't going to be posted any where. but from experience except for the fire control pocket and the mag well it's easier to do it on a manual mill with dro And then why should some one after putting in the work to generate a solid model just throw it out there for every clown to use for free. Perform a full depth finish pass to bring the pocket to its finished dimensions. Add to Favorites Add to Wish List. 12. See Figure 6. Used for much more than enough slack so that the magazine release button easily. By the forward motion of the bolt carrier United States armed forces forward motion the. 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