Rock River Arms

Rock River Arms Tactical Carbine, Complete Upper Receiver, 350 Legend, 16" Barrel, RRA Operator Muzzle Brake, RRA 13" Free Float M-LOK Handguard, Anodized Finish, Black, Fits AR-15, 10 Rounds, 1...

CALIBER:.450 BUSHMASTERUPPER RECEIVER:FORGED A4BARREL:16 INCH STAINLESS STEEL 1:24 TWIST CRYOGENICALLY TREATEDMUZZLE DEVICE:RRA OPERATOR BRAKE 5832 THREADGAS BLOCK:LOW PROFILE GAS BLOCK MIDLENGTH GAS...

Rock River Arms Tactical Carbine, Complete Upper Receiver, 458 Socom, 16" Barrel, RRA Operator Muzzle Brake, RRA 15" Free Float M-LOK Handguard, Anodized Finish, Black, Fits AR-15, Includes Bolt...

Rock River Arms BLK0592 LAR15M Coyote Carbine Complete Upper 300 Blackout 16 Black Aluminum Rec 12.50 MLOK Handgaurd Smith Vortex Flash Hider

AR-15 NATIONAL MATCH 2-STAGE TRIGGER

Rock River Arms AR0598.V1 LAR15M All Terrain Hunter Complete Upper 223 Wylde 18 Stainless Heavy Match Barrel Black Rec13 MLOK Handgaurd Operate Muzzle Brake