Shop 4,464 Deals on Upper Receivers

Bear Creek Arsenal BC15 .458 SOCOM 16in Upper Receiver Heavy Carbine 1-14 5/8x32 Flash Hide Parkerized ODG

Bear Creek Arsenal BC-15 .450 Bushmaster 18in Upper Receiver Heavy Mid 1-24 Twist 5/8x32 Flash Hider Parkerized ODG

Bear Creek Arsenal BC-10 .308 Winchester 20in Bolt Action Style Upper Receiver Heavy 1-10 5/8x24 Flash Hider 416R

Bear Creek Arsenal BC-15 6.5 Grendel 18in Bolt Action Style Upper Receiver Heavy Barrel 1-8 Twist 5/8x24 Flash Hider 416R

Grid Defense Complete Upper Receiver 9mm 9x19 Para 7.5 inch 4150 Light HBAR Barrel 1-10 Twist 7 inch Octagon M-LOK Rail A2 Flash Hider Burnt Bronze

Grid Defense Complete Upper Receiver .300 Blackout 10.5 inch Pistol Length 4150 Steel Light HBAR Barrel 1-8 Twist 10.5 inch Hand Guard A2 Flash Hider

Jacob Grey Firearms Complete Upper Assembly 9mm 4.5in 1-10 Twist 1/2x36 Thread Black

Bear Creek Arsenal BC-15 .350 Legend 20in Bolt Action Style Upper Receiver Heavy 1-16 5/8x24 Flash Hider 416R

Stag Arms AR-15 Upper Right Hand Receiver 5.56 NATO 16in Barrel Maryland Compliant HBAR Profile 1-7 Twist 1/2 x 28 Thread A2 Birdcage Flash Hider

POF USA Revolution DI Complete Upper Cerakote Burnt Bronze 308WIN 12.5"

Next Level Armament Ascend Phoenix Billet AR15 Upper Receiver Black

Tiger Rock AR-15/47/9/300 Stripped Upper Receiver Cerakote FDE Medium

Tiger Rock AR-15/47/9/300 Stripped Upper Receiver Cerakote Robins Egg Medium

Aero Precision M4E1-E Complete Upper 10.5in 5.56 BRL EM-9 Gen2 HG Anodized W/BCG/CH Black

ABC RIFLE COMPANY AR-15 Billet Stripped Upper Receiver Cerakote Red

ABC RIFLE COMPANY AR-15 7.62x39mm Micro Pistol Build 5in Barrel 4in M-LOK Handguard Upper Receiver Bronze

ABC RIFLE COMPANY AR-15 Rifle Build .223/5.56x45mm NATO 16in Barrel 15in M-LOK Handguard Upper Receiver Parts 1/2x28 Black

LaRue Tactical Complete Match Grade Upper Receiver 22in 6.5 Creedmoor 1-8 Twist A2 Flash Hider Black

CMMG Mk4/AR15 Upper Receiver Assembly Titanium

CMMG 9mm Banshee Upper Group Receiver 5in 1-10 Twist 1/2 X 28 TPI 13.7in Charcoal Green

CMMG Mk4 9mm Resolute Upper Group Receiver 16.1in Coyote Tan

Bear Creek Arsenal BC-15 .300AAC 16in Upper Receiver Heavy Carbine 1-8 1/2x28 Flash Hider 416R FDE

Bear Creek Arsenal BC-15 5.56 NATO 16in Upper Receiver M4 Carbine 1-7 1/2x28 Flash Hider Black Nitride FDE

Bear Creek Arsenal BC-10 .308 Winchester 20in Bolt Action Style Upper Receiver SOCOM 1-10 Twist 5/8x24 Flash Hider Parkerized