Knights Armament Company SR-15, CQB Mod2, Complete Upper Receiver, 556NATO, 11.5" Hammer Forged Barrel, Black Finish, MLOK 31963
FN America Upper, 223 Rem/556NATO, 11.5" Cold Hammer Forged Barrel, Carbine Length Gas System, Free Float MLOK Handguard, Fits AR15 36-100258-01
FN America Upper, 223 Rem/556NATO, 11.5" Barrel, Carbine Length Gas System, Black Finish, Two Piece Double Heat Shield Handguard, Fits AR15 36-100088-01
Daniel Defense DDM4V7 S Complete Upper Receiver Group, 556NATO, 11.5" Barrel, 1:7 Twist, Daniel Defense MFR 10" MLOK Handguard, Bolt Carrier Group, Charging Handle, Daniel Defense Vertical Grip, Black Finish 23-128-00275-047
Colt's Manufacturing Complete Upper, 223 Rem/556NATO, 11.5" Lightweight Barrel, Black Finish, Fits AR Rifles, Folding Front Sight, Magpul Rear Back Up Iron Sights, Integrated Rail LE6943CK
Colt's Manufacturing Upper, 556NATO, 11.5", Black LE6933EPR-CK
Colt's Manufacturing Complete Upper, 223 Rem/556NATO, 11.5" Lightweight Barrel, Black Finish, A2 Fixed Front Sight, Magpul BUIS Rear Sight LE6933CK