Shop 4,464 Deals on Upper Receivers

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 5.56mm/.223 10.5in Carbine Moly Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard A2 Flash Hider

DEMO Aero Precision M4E1 Complete Upper Receiver 16in 5.56 M4 Carbine Barrel EM-15 HG Gen 2 Anodized Black

DEMO Aero Precision M4E1 Enhanced Assembled Upper Receiver FDE

Aagil Arms Ted Nugent's Signature Series 5.56 NATO AR-15 Upper Receiver Assembly w/ 15in Cobra Style Handguard US Flag Cerakoted

FM Products FM-9 AR 9mm Rear Charging Upper Receiver 16 inch Black

Del-Ton Pre-Ban M4 Carbine Rifle Kit w/Dark Earth MLOK Furniture 5.56x45mm NATO 16 in 1-9 Twist Matte Black

Del-Ton Pre-Ban Heavy Profile Flat Top Barrel Assembly 5.56x45mm NATO 11.5 in Carbine Length 1-9 Twist Chrome Lined Teflon Black

Spikes Tactical Upper 300BLK 16in w/9in SAR3 Rail

Blackout Defense Dual Taper Lock Complete Interpose Uppers 11.5in Barrel M-LOK Handguard Black 14458

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Forward Assist 14.5in Pistol FDE

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Forward Assist 13.9in Pistol Grey

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Slick Side 13.9in Pistol Burnt Bronze

Noveske 14.5in Gen III Light Afghan Upper Receiver 5.56 Nsr-13.5 M-Lok Cold Hammer Forged Deadair FH 0

Del-Ton Pre-Ban Heavy Profile Flat Top Barrel Assembly 5.56x45mm NATO 16 in Carbine Length 1-9 Twist Chrome Lined Teflon Black

Stag Arms AR-10 Long Range Left Hand Upper Receiver 308 Winchester 20in Barrel NJ Compliant HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma FDE

Stag Arms AR-10 Long Range Right Hand Upper Receiver 308 Winchester 20in Barrel NJ Compliant HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black

Bilson Arms Pump Style Forward Charging Upper Assembly 6mm Arc 18 inch 1-7 Twist Cerakote Sniper Green & Grey 416R- SS

CMMG Resolute 100 Mk4 .22 Long Rifle AR-15 Upper Receiver 17

Tiger Rock Complete Upper Receiver AR 9mm 16in Length 1-10 Twist w/ 10in Super Slim M-LOK Handguard Black Large

Tiger Rock AR-15 Complete Upper Receiver 5.56mm 24in 16in Barrel M4 Carbine 1x8 Twist 1/2x28 Thread Quad Rail 15in M-Lok Handguard Brake Nitride

Radical Firearms 16in 350 Legend Complete Upper Receiver Group Black

Aero Precision Complete Upper Receiver M4E1-E 5.56x45mm NATO 13.9in Government Mid Length 1 in 7 1/2 x 28 12.7in Enhanced M-LOK HG A2 Flash Hider

Tippmann Arms M4-22 ELITE .22 Long Rifle 16in Upper Receiver M4 Rifle Length 1-16 Twist 1/2x28 A2 Bird Cage Flash Hider Matte Black

American Defense Manufacturing 300 Out 10.5 Inch Barrel M-Lok Rail Upper Reciever Olive Drab 10.5 in