Shop 4,476 Deals on Upper Receivers

Yankee Hill Machine .223 Rem/5.56 Billet Upper Receiver, Hardcoat Anodized Matte Black - 110-BILLET

CMMG Banshee 9mm Upper with 5" Barrel, Black - 99B17FDAB

Rise Armament 18" Railed Upper .22 ARC 1:7 Rifle-Length w/BCG&CH, Dark Gray

Aero Precision M4E1 Complete Upper .300 AAC Blackout 16 Barrel

Radian Weapons Model 1 Upper and Handguard Set - Superior Performance in Black - R0194

Colt Firearms LE6920CK UPPER KIT 5.56

Anderson Manufacturing AM-15 Assembled Upper Receiver, Black

Tacfire 16" Complete Upper Assembly .300 AAC Blackout 1:8, Black - BU-300-16

Patriot Ordnance Factory Renegade Plus 16.5" Complete Upper 5.56x45mm 1:8, Black - 907

Patriot Ordnance Factory Renegade Plus 10.5" Complete Upper 5.56x45mm 1:8, Black - 912

Patriot Ordnance Factory Renegade Plus 10.5" Complete Upper .300 AAC Blackout 1:7, Black - 1446

Patriot Ordnance Factory P415 Edge 16.5" Complete Upper 5.56x45mm 1:8, Black - 1309

Aero Precision EPC-9 Upper Flat Dark Earth 9mm 16 Barrel w/ ATLAS S-ONE Handguard

Alexander Arms .50 Beowulf 16" Barrel DIY Upper Kit, Black - KIT50

Luth-AR 16" Lightweight Barrel Complete Upper Receiver For 223 Rem/556NATO, Black - BAA3-L16

CMMG Banshee 5.7x28mm Upper with 5" Barrel, Black - 57BBCF0AB

Tacfire 16" Complete Upper Assembly .308 Win 1:10, Black - BU-308-16

Tacfire 10" Complete Upper Assembly 9mm 1:10, Black - BU-9MM-10

Sons of Liberty Gun Works Billet Upper Receiver - High-Quality Upper Receiver for AR-15 Customization and Performance - BROADSWORD89UR

Stern Defense 4" Classic Upper 9mm 1:10 Free Float M-LOK Rail, Black

Aero Precision Assembled Upper Receiver, OD Green

Aero Precision AR-15 Complete Upper 5.56 16 Barrel

Aero Precision M4E1 Stripped Upper Flat Dark Earth 5.56

Aero Precision M4E1 16 .300 Blackout Barrel Complete Upper Receiver