Shop 4,464 Deals on Upper Receivers

Centurion Arms AR-15 CM4 Forged 5.56 Stripped Thermal Fit Upper Receiver

DEMO TRYBE Defense AR-15 Pistol Complete Upper Receiver 5.56mm 10.5in 1-7 Twist A2 Flash hider

No Brand BC-15 7.62x39 Right Side Charging ODG Cerakote Upper 16" Parkerized Heavy Barrel 1:10 Twist Carbine Length Gas

Bear Creek Arsenal BC-15 7.62x39 16in Bolt Action Style Upper Receiver Heavy Barrel 1-10 Twist 5/8x24 Flash Hider Parkerized

EDEMO TRYBE Defense Semi-Complete Upper Receiver AR-15 5.56x45mm NATO 16in 5R Barrel 1-7 Twist 15in M-LOK Rail A2 Flash Hider Nitride Black

Spikea (TM)s Tactical Calico Lower/Upper Set 223 Rem/556NATO Sniper Green Cerakote

DEMO Aero Precision M4E1 Threaded 5.56mm Complete Upper Receiver 105in M4 Barrel 1-7 Twist A2 Flash Hider ATLAS R-ONE Handguard Black Anodized

DEMO Aero Precision Complete Upper Receiver M5 .308 Winchester 20in Heavy Rifle Length 1 in 10 5/8 x 24 15in A2 Flash Hider Anodized OD Green

Bear Creek Arsenal Right Side Charging AR-15 Upper Receiver - Black

USED TacFire DPMS Complete Upper Assembly Low Profile .308 Winchester 20in Type III Hard Anodized Black Large EDEMO7 Used Condition Fair

USED Black Rain Ordnance 556 SOCOM 16 Inch Complete Upper Black BRO-SPEC15-CU-SOCOM-56 EDEMO1 Condition Parts Only/Salvage Wrong Product

Guntec USA AR-15 Complete 5.56 Upper Receiver w/o Lower Parts Kit N.4 15in Air-Lok M-Lok Handguard MLS Gen 2 Stock Assembly Carbine Length .750 Gas

Ghost Firearms Upper Receiver Pistol Lower Parts Kit 5.56mm 7.5in Pistol 4150 Chrome Moly Steel Barrel 1-7 Twist 7in M-LOK Free Float Hand Guard A2

Ghost Firearms Elite Complete Upper Receiver 5.56x45 NATO 7.5 inch Pistol Length 4150 M4 Barrel 1-7 Twist 7 inch M-LOK Free Float Hand Guard A2 Flash

USED Ghost Firearms Upper Receiver Rifle Lower Parts Kit .300 Blackout 16in Pistol Moly 1-8 14in M-LOK Free Float Hand Guard A2 Flash Hider Blue

USED Ghost Firearms Elite Complete Upper Receiver 5.56x45 NATO 10.5 inch Carbine Length 4150 M4 1-7 9 inch M-LOK Free Float Hand Guard A2 Flash Hider

EDEMO Ghost Firearms Vital Upper Receiver Pistol Lower Parts Kit 5.56mm 10.5in Carbine 4150 M4 Barrel 1-7 Twist 9in M-LOK Free Float Hand Guard A2

Quarter Circle 10 Complete 9mm Upper w/ PMUR 7.5in Barrel 1/2 - 28 7.5in HG FH Black

Quarter Circle 10 45 ACP Complete Upper Receiver w/ PMUR 10.5in Barrel .578-28 10.5in HG FH Black

USED IMG AR-15 .410 19.25in Complete Upper Receiver w/10 Roumd Magazine Black

Guntec USA AR-15 Billet Upper Receiver w/Forward Assist Ejection Door Assembly

NBS AR-15 Left Handed Slick Side Billet Upper Receiver

FM Products MIKE-9 9mm Complete Upper Receiver 12.75 inch 5 inch Barrel MIL-SPEC Rear Charge 1-10 Twist 1/2x36 Thread Free-Float Nitride Black

Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 10.5 Inch Barrel 1-7 Twist 1/2-28 Thread Free-Float Handguard A2 Flash Hide Black