For more information, go to LAR-15, LAR-8, LAR-6.8, LAR-458, LAR-9, LAR-40, LAR-47, LAR-300, LAR-15LH LEF-T, WYL-EHIDE, PRK-EHIDE, NSP, IRS, X-Series, and ROCK RIVER ARMS are registered trademarks of Rock River Arms, Inc.

The main difference between these terms is that the A1, A2, and A3 have a permanently attached carry handle, while the A4 does not. Upper receivers may also be referred to as A1, A2, A3, or A4 receivers. Upper Style Flat Top A3 with Removable Carry Handle Barrel Length 16 M4 Profile Barrel Material 4150 steel Bore Chrome Lined Muzzle Brake A2 Birdcage. To cause cancer, birth defects or other reproductive harm. Flat top uppers feature a picatinny rail, while carry handle uppers have a fixed rear sight assembly on the top. Carry Handle, Detachable, with M4 Rear Sight, AR-15. Bore Condition: The bore is bright and the rifling is sharp. Includes A2 Rear Sight Assembly, Round Forward Assist Assembly and Ejection Port Cover Assembly Upper Receiver Parts Kit, A4 / M4.

Type of Finish: Phosphate and Black Anodized Aluminum. Features shell deflector, forward assist housing, and provisions for installing an. WARNING: The products offered for sale on this website can expose you to chemicals which are known to the State of California The rear sight is a standard A2 dual aperture adjustable for elevation and windage mounted to the integral carry handle on the upper receiver. A2 carry handle style, complete with cuts for mounting A2 rear sight.

A2 carry handle upper