Shop 4,464 Deals on Upper Receivers

PSA AK-P GF4 Barrel Assembly - Furniture Ready

USED CMMG Mk4/AR-15 Forward Assist Upper Receiver Assembly Armor Black 55BA206-AB EDEMO1 Used Condition Like New

WMD Guns AR-15 A3/A4 Upper Receiver Forged w/M4 Feed Ramps Stripped NiB-X Purple

Dark Storm Industries DS-15 Complete Upper Receiver TYPHOON Model .300 Blackout 16in Barrel 1-8 Twist Threaded Black

Dark Storm Industries DS-15 AR-15 .300 AAC Blackout 16 inch Upper Receiver Pistol Length 1-8 Twist Non Threaded FDE

USED TRYBE Defense AR-15 Magnite Go Fast Ultra Lightweight Stripped Upper Receiver Black AR15MGFSU-BK

KAK Complete Upper- AR10, 308 Win, 18" Barrel, Rifle Gas System, 15" MLOK

KAK Complete Upper Receiver- 300 WSM - 19" Barrel 15" - MLOK

Complete AR15 Upper- Bravo Mount, 7.62x39, 13.9" Pin/Weld (16" OAL)

EDEMO Nordic Components AR15 Extruded Flat Top Picatinny Rail NC15 Stripped Upper Black NC15-UR-EXT EDEMO1

EDEMO Spikes Tactical M4 Flat Top Upper SFT50M4 EDEMO17 Used Condition Fair

USED Matador Arms Mat9 Upper Receiver 9mm 7.825 in 1-10 Twist 1/2x28 Threads 4150 Lightweight Nitrided FDE MAT9-U-FDE

Moriarti OpticsPlanet Exclusive Pistol Upper Receiver AR-9mm 4.5inStraight 1-10 Twist 1/2x36 4in Diamond Cut MLOK Slim Profile Black

Moriarti Complete Upper Receiver AR-15 5.56 Nato 16 inch Barrel M4 Carbine Length 1x7 Twist 1/2x28 Thread M-LOK Handguard Triport Hardcoat Anodized

Moriarti Moriarti AR-74 5.45X39 16in M-LOK Upper Assembly Medium Carbine 1-8 Twist A2 Flash Black

DEMO Aero Precision AR15 Complete Upper Receiver 16in 5.56 Carbine Barrel w/ Pinned Front Sight Base M4 Handguard Black

EDEMO TacFire Complete Upper Assembly 9mm 16in Black Large BU-9MM-16 EDEMO1

USED TacFire Complete Upper Assembly 9mm 16in Black Large BU-9MM-16

Midwest Industries Combat Rail HD .223 Wylde 11.5inch Upper Receiver Group CORE Carbine Length 1-8 Twist 1/2x28 Threads A2 Hardcoat Anodize Black

Vltor Keymod Polylithic Upper Carbine Black

Vltor Rifle Length Upper Receiver with Shell Deflector Only Black

Zev Technologies Billet Upper M-Lok Black .223 Wylde 16-inch

OpticsPlanet Exclusive Moriarti AR-15/47/9/300 Billet Upper Receiver Slick Side no Forward Assist Anodized Black

No Brand BC-15 .300 Blackout Right Side Charging ODG Cerakote Upper 16" Parkerized Heavy Barrel 1:8 Twist Pistol Length