DPMS .223 / 5.56 Upper Receiver Claw Block DPMS-TL-PRC

Patriot Ordnance Factory Renegade Plus Upper 13.75 5.56 Direct Impingement Adjustable Gas Block

Geissele Automatics 5.56 USASOC Improved Complete Near-Clone AR-15 Upper Receiver - Desert Dirt- 10.3" - Open Box

BUSHMASTER QRC Upper 5.56 NATO 16" - Black

Q Sugar Weasel Complete AR-15 Upper Receiver - 5.56 - 13"

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

Sons of Liberty Gun Works M4-76 5.56 Barreled Upper Receiver - 13.7"

Geissele Automatics Super Duty MOD1 5.56 NATO Complete Upper Receiver - 14.5" Pinned - DDC - Open Box