The innovative SHRIKE 5.56 upper receiver is designed to fit any MIL-SPEC quality AR-15/M16/M4-type lower receiver and features a dual-feed system, allowing users to configure the SHRIKE 5.56 from ...

Installation is accomplished by inserting the HK buffer and buffer spring and attaching the HK upper to an AR lower receiver using ... tube normally found in AR15/M16/M4-style firearms.

Early SP1s closely mimicked the Colt 601 version of the M16, with a three-prong “duckbill” flash hider, solid stock, fenceless “slabside” lower receiver and upper receiver sans forward assist.

22-caliber pistol, formed from a 3D-printed AR-15 (M16) lower receiver, and a normal, commercial upper. In other words, the main body of the gun is plastic, while the chamber -- where the bullets ...

However, the T65 is hardly a clean-slate design, practically copying the M16 design in the lower receiver and heavily emulating other elements in the upper receiver. The primary difference between ...

However, the T65 is hardly a clean-slate design, practically copying the M16 design in the lower receiver and heavily emulating other elements in the upper receiver. The primary difference between ...

They are designed to fit on any AR-15, M16 or M4 lower receiver ... It has a 7075-T6 billet upper receiver, feed cover and charging handle, and a precision-machined billet steel feed tray.

The Army is issuing Soldiers a new small arms 5.56 ammunition magazine designed expressly for the M4/M4A1 carbine and M16 family of ... tipped M855A1 at the upper receiver/barrel extension ...