Shop 4,464 Deals on Upper Receivers

Aero Precision EPC-9 Enhanced Upper Receiver Assembled AR-15 9mm Luger Last Round Bolt Hold Open Aluminum Olive Drab Green

Aero Precision AR-15 M4E1-E Complete Upper Assembly 5.56x45mm NATO 16" HBAR Barrel 15" EQ Gen2 Enhanced Handguard Flat Dark Earth

Caracal CAR816 A2 Patrol 5.56x45mm NATO Complete Upper 14.5in Barrel

Lightweight Stripped Billet 9mm Upper Receiver

Wilson Combat Upper Receiver 5.56x45mm NATO AR-10 Billet Anodized Black

Del-Ton A3 AR-15 Complete Upper Receiver 5.56x45mm NATO 20" Government Contour Barrel

Rock River Arms AR-15 R3 Competition Upper Receiver Assembly 223 Wylde 18" Stainless Steel Barrel 15" M-LOK Handguard Black

Wilson Combat Upper Receiver .458 SOCOM AR-15 Standard Anodized Black

Aero Precision M4E1-T Upper 5.56x45mm NATO 12.5" Government Contour Barrel 11.4" Mod4 Handguard Olive Drab Green

Anderson Manufacturing Complete Upper - Optic Ready Black .300 AAC Blackout 16-inch

Noveske MUR Modular Upper Receiver with Combination Forward Assist, Shell Deflector Assembled AR-15 Aluminum Black

Stern Defense AR-15 SD 4 MOD4 Upper Receiver Assembly 45ACP 4" M-LOK

M16A1 Stripped Upper Receiver w/o M4 Feedramps

Wilson Combat AR-15 Billet Stripped Upper Receiver .458 SOCOM Black

Radical Firearms RF Upper Assembly 16in 5.56 SOCOM 1/7 Twist 12in MHR M-LOK A2 Flash Hider Black

LWRC REPR MKII Elite Upper OD Green 6.5 Creedmoor 22 Barrel

American Tactical Imports ATI Omni Hybrid Ar15 Stripped Polymer Upper Receiver Green

Seekins Precision IRMT-3 AR-15 Billet Upper Receiver Black

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 13.9in Mid Black

Aero Precision Complete Upper Receiver M4E1-T SM12.7 5.56x45mm NATO 13.9in Government Mid Length 1 in 7 1/2 x 28 12.7in A2 Flash Hider Cerakote FDE

Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 20in 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized

Rock River Arms Assembled AR-15 A2 Upper Receiver Matte

Stag Arms Stag 15 Upper Black / Stainless 6.5 Creedmoor 22 Barrel

Mean Arms Bearing Delay AR-15 9mm 14.5in Upper Receiver Assembly 1/2x28 Black