Expo Arms Barreled AR-15 Upper Receiver - 5.56 - 16" - XP1215KM Keymo Brake - Open Box

AERO PRECISION M4E1-T 5.56 NATO 11.5" Complete Upper Receiver | Black

American Tactical AR-15 Mil-Sport Canada Export Complete Lower ATIGCMS101

AERO PRECISION AC-15M RIFLE - 5.56 NATO 16" BBL BLACK

AERO PRECISION AR15 5.56 NATO / 223 Rem 20" Complete Upper Receiver w/ Carry Handle | Black

Del-Ton Sierra 316 556 Nato 16" Barrel 11" Samson EVO KeyMod Handguard SMORH160

LUTH-AR A1 Stripped Upper Receiver 223/5.56mm Aluminum Black Hardcoat Anodize Receiver For M16 (UR-01-M16)

ALEXANDER AR15 STANDARD UPPER - 300AAC 16" BLACK