ACME Machine Products

Barrel: 10.5" 416R Stainless Steel M4 ContourTwist: 1:8Caliber: 5.56 Chamber10" Free Float HandguardACME AR-15 Upper Receiver ACME 5.56 Mil-Spec Bolt Carrier Group AR-15 Nitride C158 *Picture might show optional accessories

Barrel: 10.5" 4150 Parkerized M4 ContourTwist: 1:7Caliber: 5.56 Chamber10" Free Float HandguardACME AR-15 Upper Receiver ACME 5.56 Mil-Spec Bolt Carrier Group AR-15 Nitride C158 *Picture might show optional accessories

Barrel: 7.5" Black NitrideTwist: 1:7Caliber: 5.56 Chamber7" Free Float HandguardACME AR-15 Upper Receiver ACME 5.56 Mil-Spec Bolt Carrier Group AR-15 Nitride C158 ACME Charging Handle     *Picture might show optional accessories

Barrel: 7.5" 416R Stainless Steel ContourTwist: 1:7Caliber: 5.56 Chamber7" Free Float HandguardACME AR-15 Upper Receiver ACME 5.56 Mil-Spec Bolt Carrier Group AR-15 Nitride C158 ACME Charging Handle   *Picture might show optional accessories

This is our standard AR-15 Micro Gas Block. Designed with the minimum profile to fit under nearly any quad rail system, it snugly fits .875 diameter barrels. Features: Mil-Spec dimensions .875 diameter Hardened Steel construction Non-reflective, Matte...

This is our standard AR-15 Micro Gas Block. Designed with the minimum profile to fit under nearly any quad rail system, it snugly fits .936 diameter barrels. Features: Mil-Spec dimensions .936 diameter Hardened Steel construction Non-reflective, Matte...

This KeyMod Accessory Rail provides a 4-1/2" 9 slot section of mil-spec-M1913 Picatinny rail for the addition of tactical accessories. It was designed specifically for the slim type handguards, this rail section is also compatible with any other rifle...

This M-LOK Accessory Rail provides a 4-1/2" 9 slot section of mil-spec-M1913 Picatinny rail for the addition of tactical accessories. It was designed specifically for the slim type handguards, this rail section is also compatible with any other rifle...

Muzzle Jam Nut  5/8x24

Muzzle Jam Nut  1/2x36

Muzzle Jam Nut  1/2x28

Thread Protector 5/8x24 - .920 OD

Thread Protector 1/2x24 - .920 OD

Thread Protector 5/8x24 - .750 OD

Thread Protector 1/2x36 - .750 OD

Thread Protector 1/2x28 - .750 OD

Pivot rotates to either side, allowing for uneven terrain sight adjustments. Locking mechanism secures any pivot angle. Springs with tension adjustment sealed and protected with durable rubber tubing. Heavy duty construction with hardened steel...

This ACME exclusive Made in USA handguard brings all the flexibility of M-LOK®, for those who prefer the lighter, sleeker look of a free floating handguard. This handguard is made of durable aircraft grade aluminum alloy, and finished with a long...

Features and Specifications:6 Position Mil-spec Diameter Receiver Extension TubeExtension Tube CNC Machined from 6061-T6 Aircraft Grade Aluminum with Precisely Rolled Threads for Durable Thread Engagement with Lower ReceiverFinished in Matte Black Type...

Easy, Fast Separation Of Upper & Lower Receiver HalvesPivot and takedown pins with easy-to-grasp, oversized heads make separating upper and lower receiver halves fast and easy. Simply grasp the large, button-style head and disengage the pin—no...