Shop 4,464 Deals on Upper Receivers

Cobalt Kinetics 16in CK-PRO Aluminum Stripped Upper Receiver Group Black Cerakote

Primary Weapons Systems MK116 MOD 1-M Upper Receiver 7.62x39 16.1in Pistol Length 1-10 Twist PWS Triad 30 3-Setting Adjustable Gas System Black

Aero Precision AR15 Assembled Upper Receiver No Forward Assist FDE

Cobalt Kinetics 13in CK-PRO Aluminum Stripped Upper Receiver Group Flat Dark Earth Cerakote

Aero Precision EPC-9 Enhanced Upper Receiver Assembled AR-15 9mm Luger Last Round Bolt Hold Open Aluminum Kodiak Brown

Griffin Armament PSD 9.5 inch 5.56mm

Knights Armament Upper Receiver Kit 5.56 NATO 14.5 Barrel M-LOK

Knights Armament Company AR-15 Upper 5.56 NATO

CMMG Mk4 5.56X45mm NATO Banshee Upper Group Receiver 10.5in 1-7 Twist 1/2 X 28 TPI 18.8in Armor Black

Lead & Steel JAG 5.56mm 18in Upper Receiver Group Rifle Length 1-8 Twist Earth

Radian Weapons Upper/Handguard Set, Cerakote Finish, Olive Drab Green, Fits AR-15, Includes 15.5 in MLOK Handguard, Radian Raptor-SD Charging Handle R0621

Aero Precision EPC-9 Threaded Complete Upper Receiver 11in 9mm w/ ATLAS S-ONE 10.3in Handguard Anodized Black

Sig Sauer MCX-Spear LT Upper/Conv. Kit 5.56 11.5 Barrel

CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly Armor Black

Lead & Steel Just As Good Upper Receiver Group 16in Barrel 1-7 Twist Charcoal

Aero Precision M4E1-T Upper 5.56x45mm NATO 14.5" Government Contour Barrel 13.5" Mod4 Handguard Olive Drab Green

ATI Alpha Upper Kit 410GA 18.50 5rd Black

Primary Weapons Systems MK116 MOD 2-M Upper Receiver 7.62x39 16.1in 1-10 Twist FSC 30 3-Setting Adjustable Gas System Black

Lead & Steel .223/5.56mm Mil-Spec Stripped Upper Receiver Earth

Lead & Steel JAG 5.56mm 16in Upper Receiver Group Mid Length 1-7 Twist Flash Hider Earth

Daniel Defense DD5 V3 .260 Rem 20" Bbl M-LOK Complete Upper Receiver Group 23-165-06059

American Tactical Imports ATI Omni Hybrid Ar15 Stripped Polymer Upper Receiver FDE

Daniel Defense Big Hole Flat Top Upper Receiver w/Feed Ramps 04-012-09001

Cobalt Kinetics CK-Pro Urg Aluminum Black Cerakote Receiver