Shop 4,464 Deals on Upper Receivers

APF 5.56 NATO 7in Complete Upper Black

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 10.5 in

Rainier Arms RUC DI 5.56 Nato Partial Upper Receiver Black 14.5 in

XTS Complete Upper Receiver w/o BCG w/ Ce Rail AR-15 .223/5.56 16.5in 7.5in Barrel Pistol 1-7 Twist 1/2x28 Thread M-LOK Bird Cage Black Finish

XTS Complete Upper Receiver w/o BCG AR-15 300 BO 19.5in 10.5in Pistol 1-8 Twist 5/8x24 Thread M-LOK Bird Cage Black Nitride Finish Blue

XTS Complete Upper Receiver w/o BCG AR-15 300 BO 19.5in 10.5in Pistol 1-8 Twist 5/8x24 Thread M-LOK Bird Cage Black Nitride Finish Red

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 19.5in 10.5in Carbinel Government 1-7 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish Red

Guntec USA AR-15 Stripped Billet Upper Receiver 15 in Air Lite Series M-LOK Handguard Combo Set Anodized Black

Maxim Defense Industries MD15-1505 Upper Receiver 7.62x39mm 14.5in 5.5in Medium Barrel Pistol 1-10 Twist 5/8x24 Thread M-Slot Handguard Hatebrake Type

GLFA Black Stripped AR-15 Upper A3 w/Oversized Ejection Port

V Seven Harbinger 308 Sbr Complete Upper 11.5in 11.5HAR 308SBR-UR

KE Arms Stripped UpperReceiver

PSA AK-102 Side Folding Barrel Assembly - Furniture Ready

PSAK-47 GF3 "American Bastard" 12.7" Side Folding Pistol Barrel Assembly with JMAC RRD 360 Muzzle Device - Furniture Ready

CBC Industries CHS-2 Patrol AR-15 Rifle Kit 300AAC 16in 1-8 15in M-Lok Handguard Black

DEMO POF USA P415 Edge Upper Receiver Assembly 5.56x45mm NATO 16.5in Barrel 14.5in M-LOK Rail Cerakote Burnt Bronze

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 13.7in 13.75in Combat Barrel M89 Rail P/W HUX XL Flash Hider No BCG or CH Black

New Frontier Armory New Frontier Pistol Cal Upper Side Charger Billet Black

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 7.5in Pistol 4150 Moly Steel Barrel 1-8 Twist 7in M-LOK Free Float Hand Guard A2

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 Elite Complete Upper Receiver 9mm 9x19 Para 16 inch 4150 Light HBAR Barrel 1-10 Twist 14 inch M-LOK Free Float Hand Guard A2 Flash

Ghost Firearms Upper Receiver Rifle Lower Parts Kit .300 Blackout 16in Pistol Light HBAR Barrel 1-8 Twist 14in M-LOK Free Float Hand Guard A2 Muzzle

Ghost Firearms Upper Receiver Pistol Lower Parts Kit .300 Blackout 10.5in Pistol Light HBAR Barrel 1-8 Twist 11in M-LOK Freefloat Handguard Flash Can

Ghost Firearms Elite Complete Upper Receiver .300 Blackout 10.5in Pistol Length 4150 Light HBAR Barrel 1-8 Twist 9in M-LOK Free Float Hand Guard A2