Shop 4,464 Deals on Upper Receivers

Kaw Valley Precision Carbon Fiber 9mm Complete Barrel Upper Receiver 8.5in Barrel 10.25in CF Handguard XL Linear Compensator Black Medium

Griffin Armament RECCE AR-15 Pistol Complete Upper Receiver 223 Remington (Wylde) 16" Barrel

DPMS Upper M4 Flat Top 223 16-inch PREBAN

Cobalt Kinetics 11.8in CK-PRO Aluminum Stripped Upper Receiver Group Black Cerakote

Aero Precision M4E1-T Upper 5.56x45mm NATO 12.5" Government Contour Barrel 11.4" Mod4 Handguard Black

CMMG Mk3 Endeavor Upper Receiver Group 6.5mm Creedmoor 20in Armor Black

Lead & Steel Arc Mil Spec Stripped Upper Receiver Forged 7075-T6 Charcoal

Black Rain Ordnance Barrel .458 SOCOM 10.5

Knights Armament Upper Receiver Kit 5.56 NATO 11.5 Barrel M-LOK

Sons of Liberty Gun Works EXO3 Complete Upper, 300 Blackout, 16 in Combat Barrel, 1:7 in Twist, QPQ Finish, Black, 15 in EXO3 M-LOK Handguard, A2 Flash Hider EXO3UPPER-16-300

LBE Unlimited Barrel ARBAR7-10, 223 Rem/556NATO, 10.5 in Barrel, 1:7 Twist, Fits AR-15, Black Nitride Finish ARBAR7-10

Mega Arms MATEN Upper Receiver Stripped AR-15 Billet Aluminum Black

Sig Sauer MCX-Spear LT Upper/Conv. Kit Black .300 AAC Blackout 9 Barrel

Mega Arms GTR-3H Stripped AR-15 Billet Upper Receiver Aluminum Black

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

SOLGW L89 UPPER 555 13.9 V2

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

LWRC IC-SPR 5.56mm NATO 16.1" 1:7" 1/2x28 Bbl Black Complete Upper Receiver ICU5B16SPR

Ballistic Advantage Modern Series, 9MM, 8.3 in, Black, AR15 BABL9MM005M

Aero Precision M4E1 Complete Upper Receiver 5.56 Barrel w/ FSB EQ-7 HG No BCG/Charging Handle Anodized Black 10.5in APAR600211Q3

Troy AR-15 A3S Upper Receiver Assembly 5.56x45mm NATO 11.5" barrel with 10.5" Gen 2 SOCC Handguard

Radical Firearms Upper 223Wylde 18-inch 1:8-Twist

Aero Precision M4E1-T RM15 Complete Upper 5.56 x 45 16inch HBAR Mid Length 1-7 Twist 1/2 x 28 Thread Cerakote FDE

Battle Arms Development Authority Elite, Complete Upper Receiver, 556NATO, 10.5 in Barrel, Fits AR-15, M-Lok Handguard, Anodized Finish, Sniper Gray, Includes Bad Rack-15 Ambidextrous Charging Handle and AR15/M16 BCG BAD-AUTH-UR10.5G-Y-15