5.56x45mm NATO Upper Receivers

Expo Arms 16" 5.56 AR-15 Lite Upper Receiver Group with Charging Handle and BCG

Expo Arms Barreled AR-15 Upper Receiver - 5.56 - 16" - Quad Rail

Expo Arms Barreled AR-15 Upper Receiver - 5.56 - 16"

Expo Arms Barreled AR-15 Upper Receiver - 5.56 - 10.5"

Expo Arms Barreled AR-15 Upper Receiver - 5.56 - 10.5"

Bear Creek Arsenal BC-15 Complete AR-15 Upper Receiver - 5.56 - 16"

Bear Creek Arsenal BC-15 5.56 NATO Upper Receiver - AR-15 Complete Upper - 10.5"

Radian Weapons Assembled AR-15 Upper Receiver - 15.5" - Radian Brown

Expo Arms Lite Barreled AR-15 Upper Receiver - 5.56 - 16" - Open Box

Expo Arms Barreled AR-15 Upper Receiver - 5.56 - 16" - Overrun - Open Box

Expo Arms 16" 5.56 NATO AR-15 Barreled Upper Receiver - 15" M-LOK Handguard - A2 Flash Hider - Open Box

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

Precision Defense Barreled AR-15 Upper Receiver - 5.56 - 16" - Open Box

Radical Firearms 16" 5.56 NATO 1:7 Mid-Length SOCOM Barreled Upper - 12" M-LOK FCR Rail - Open Box

Daniel Defense V7 URG 5.56 NATO Barreled Upper Receiver - 11.5" - Primary Arms Exclusive - Open Box

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

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

Hodge Defense Systems MOD1 URG Complete AR-15 Upper Receiver - 5.56 - 16" - BLEM

Sons Of Liberty Gun Works M4-89 11.5" 5.56 NATO Barreled Upper Receiver Group - FREE SOLGW Ambi Charging Handle - BLEM

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

Lewis Machine and Tool Monolithic MRP-L Shovelnose Assembled AR-15 Upper Receiver - 11.5"

Lewis Machine and Tool MRP-L Stripped AR-15 Upper Receiver - 9.25" - M-LOK Grenadier Handguard

Lewis Machine and Tool MRP-L Stripped AR-15 Upper Receiver - 9.25" - M-LOK Handguard

Lewis Machine and Tool Monolithic MRP-L PDW Assembled AR-15 Upper Receiver - 7.25"