Shop 4,464 Deals on Upper Receivers

CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Sniper Grey

CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Charcoal Green

CMMG Resolute Mk3 8.6 Blackout 16.1 inch Upper Receiver CMM

CMMG Resolute Mk3 8.6 Blackout 16.1 inch Upper Receiver CMM

ABC RIFLE COMPANY AR .40 S&W Pistol 4in Barrel M-LOK Handguard Complete Upper Receiver w/BCG And Charging Handle Flat Dark Earth

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Flat Dark Earth

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Black

ABC RIFLE COMPANY AR-15 7.62x39mm Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Olive Drab Green

ABC RIFLE COMPANY AR-15 7.62x39mm 10in Quadrail Handguard Complete Pistol Upper Receiver w/BCG And Charging Handle Red

Dirty Bird AR-15 Stripped Upper Receiver-Blem - FDE

Stag Arms AR-10 Long Range Right Hand Upper Receiver 308 Winchester 20in Barrel NJ Compliant HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma FDE

Stag Arms AR-10 Tactical Left Hand Upper Receiver 308 Win 16in Barrel TAC-GOV-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma Black

American Defense Manufacturing 5.56 12.5 Inch Barrel M-Lok Rail Upper Reciever Flat Dark Earth 12.5 in

Tiger Rock Upper Receiver AR-9 Enhanced 9mm AR-15 Billet Black Small

Tiger Rock AR-15 Barrel Rifle Modular Kit .223 Wylde 24in 18in Barrel M4 A2/Government Mid 1x7 Twist 1/2x28 Thread 15in M-Lok Handguard Brake

CMMG Upper Group Dissent 45 Acp 16.1in 1-16 Twist 0.578 X 28 TPI 25.5in Tungsten

Caracal CAR814 A2 Patrol 5.56x45mm NATO Complete Upper 14.5 Barrel

CMMG Dissent Mk4 .350 Legend 16.1in Upper Group 1-16 Twist 1/2x28 TPI 25.5.in .750in Titanium

CMMG Dissent Mk4 6mm ARC 16.1in Upper Group 1-7.5 Twist 5/8 X 24 TPI .750in 25.5in Charcoal Green

CMMG DISSENT 5.7x28mm 6.5in Upper Receiver 1-9 Twist 1/2 X 28 TPI Midnight Bronze

Sons of Liberty Gun Works East India Starter Kit Marksman Grade 13.9in 6.5 Grendel Black

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish

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

JL Billet Upper Reciever .308 Billet Black