Shop 4,464 Deals on Upper Receivers

USED Colt 223 Rem/ 556 NATO M4 Feed Ramps Upper Black

No Brand BC-15 5.56 NATO Right Side Charging ODG Cerakote Upper 16" Parkerized M4 Barrel 1:8 Twist Carbine Length Gas

Bear Creek Arsenal BC15 .300AAC 16in Right Upper Receiver Heavy Carbine 1-8 5/8x24 Flash Hide Parkerized Tungsten

Bear Creek Arsenal BC-15 12.7x42 10.5in Bolt Action Style Upper Receiver Heavy 1-20 1/2x28 Flash Hider Parkerized

DEMO Radian Weapons Model 1 Upper Receiver and Hand Guard Set 15.5 in M-LOK Radian Black

Complete Upper Receiver - 9mm - 16" Barrel- 15" MLOK

Jacob Grey Firearms Stripped Upper Receiver Billet AR-9 9mm Anodized Black

Guntec USA AR-15 Stripped Billet Upper Receiver w/7in Ultralight Series M-Lok Handguard Flat Dark Earth

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 7.5in Pistol Moly Barrel 1-8 Twist 7in M-LOK Free Float Hand Guard A2 Flash Hider

Ghost Firearms Elite Complete Upper Receiver .300 Blackout 7.5in Pistol Length 4150 Light HBAR Barrel 1-8 Twist 7in M-LOK Free Float Hand Guard A2

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 9mm 9x19 Para 16in Carbine Light HBAR Barrel 1-10 Twist 14in M-LOK Freefloat Handguard A2 Muzzle

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 7.62x39 16in Carbine Light HBAR Barrel 1-10 Twist 14in M-LOK Free Float Hand Guard A2 Muzzle

Ghost Firearms Upper Receiver Rifle Lower Parts Kit 5.56mm 16in Carbine 4150 Moly Steel Barrel 1-7 Twist 14in M-LOK Free Float Hand Guard A2 Flash

Evolve Weapons Systems Complete Upper Receiver 12.5in Patrol Gas System M-LOK Handguard Black

Blackout Defense Complete Dual Taper Lock .300 AAC Upper Receiver Group Slick Side 9in Pistol Green

TRYBE Defense Magnite AR-15 Enhanced BCG/.223 Wylde 10.5in Complete Upper Receiver Carbine Length 1-8 1/2x28 Black

TRYBE Defense Magnite AR-15 .300 BLK 16in Complete Upper Receiver Carbine Length 1-8 5/8x24 Black

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

Blackout Defense Complete Dual Taper Lock .223 Wylde Upper Receiver Group Slick Side 12.5in Interpose Grey

Spikes Tactical Upper 5.56 16in M4 LE w/FDE M-LOK Handguard & FSP

Spikes Tactical Upper 5.56 11.5in FN CHF w/13.2in SAR3 Rail

Spikes Tactical Upper 5.56 11.5in FN CHF w/12in SAR3 Rail

Spikes Tactical Upper 5.56 14.5in 16in OAL CHF Midlength w/12in SAR3 Rail and Vortex Muzzle Device Black

Spikes Tactical Upper 300BLK 16in w/12in BAR2 Rail