Shop 4,464 Deals on Upper Receivers

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Slick Side 13.9in Pistol Grey URGDTL300BLK13.9SLKGRY

Bilson Arms Pump Style Forward Charging Upper Assembly 450BMFC-UA 16 inch 1-24 Twist Cerakote Fde/Graphite Black

Bilson Arms Pump Style Forward Charging Upper Assembly 350LGNDFC-UA 16 inch 1-16 Twist Cerakote Fde/Graphite Black

Bilson Arms Pump Style Forward Charging Upper Assembly 300BLKFC-UA 16 inch 1-8 Twist Cerakote Fde/Graphite Black

Bilson Arms Pump Style Forward Charging Upper Assembly 6mm Arc 18 inch 1-7 Twist Cerakote Fde/Graphite Black 416R- SS

Bilson Arms BA-15FC Pump Style Forward Charging Upper Assembly 5.56mm/.223 Remington 24.5in 16in 1-7 Twist 1/2-28 Free-Float A2 Birdcage 416R

CMMG 9mm Banshee Fixed Ejector Upper Group Receiver 8in 1-10 Twist 1/2 X 28 TPI 16.5in Charcoal Green

CMMG 9mm Banshee Fixed Ejector Upper Group Receiver 5in 1-10 Twist 1/2 X 28 TPI 13.7in Midnight Bronze

CMMG Upper Group Dissent Mk3 .308Win 16.1in Empire Profile Non-Threaded Midnight Bronze

Tiger Rock Complete Upper Receiver AR-9mm 7.5in Pistol Length 1-10 Twist w/ 7in Super Slim M-LOK Handguard Black Large

Radical Firearms Complete Upper Assembly 16in 300 AAC HBAR Contour 1/8 Twist 9in MHR M-LOK A2 Flash Hider Black

Jacob Grey Firearms Complete Upper Assembly 5.56 NATO 16in 1-7 Twist 1/2x28 Thread Black

POF USA Rogue Upper Receiver Assembly Mid Length 11in Handguard 12.5in Barrel 5/8x24 M-LOK Micro B Muzzle Break Patriot Brown

POF USA Rogue Upper Receiver Assembly Mid Length 11in Handguard 16.5in Barrel 5/8x24 M-LOK Micro B Muzzle Break Patriot Brown

POF USA Revolution DI Upper Receiver 308 WIN 18.5in Barrel Rifle Length 1-10 Twist 5/8x24 14.5in M-Lok Rail Triple Port Muzzle Break Burnt Bronze

Tiger Rock AR-15 Rifle Build Kit BCG LPK and Stock Kit 5.56mm 17in 16in Barrel M4 A2/Gov Carbine 1x8 1/2x28 10in Quad Rail Handguard Brake Nitride

Aero Precision M4E1-T PRO CHF M4 5.56mm 13.9 inch Complete Upper Receiver Hanson Mid Length 1-7 Twist A2 Birdcage Anodized OD Green

Aero Precision OPMOD AR-15 Compete Upper Mid Length 5.56x45 1/2x28 Threads Black

American Tactical M4 Stripped Upper Receiver

Spikes Tactical Upper 5.56 14.5in 16in OAL Midlength Lightweight LE w/9in BAR2 Rail w/ Vortex FH

Spikes Tactical Upper 300BLK 10in Forged w/9in SAR3 Rail

Del-Ton Pre-Ban Heavy Profile Flat Top Barrel Assembly 5.56x45mm NATO 20 in Rifle Length 1-9 Twist Chrome Lined Teflon Black

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

DoubleStar Barreled Upper Receiver .224 Valkyrie 24 inch Barrel Bull Profile Diamond National Free Float Handguard Black