Shop 4,464 Deals on Upper Receivers

USED Grid Defense Complete Upper Receiver 7.62x39 10.5 inch Carbine Length 4150 Steel Light HBAR Barrel 1-10 Twist A2 Flash Hider Blue Titanium

USED Bushmaster V-Match Complete Upper Assembly 5.56mm NATO/.223 Remington 16 Inch Heavy-Profile Match Grade Chrome Lined Barrel T-Marked Flat Top

Jacob Grey Firearms Complete Upper Assembly AR-10 .308 Winchester 12.5in 1-10 Twist 5/8x24 Thread Carbon Fiber Black

Jacob Grey Firearms Ultralight Complete Upper Assembly .300 AAC Blackout 13in Black

Dark Hour Defense Upper Receiver Lite AR-15 Hard Coat Anodized Black

Quarter Circle 10 Side Charging Complete 45 ACP Upper Receiver Assembly 10.5in Barrel Black

USED Moriarti Complete Billet Upper Receiver .308 Cal AR Dpms Low Profile Black MAR-AR10-UR-DC-FA EDEMO1 Used Condition Like New Inspect and Rebox

Complete AR15 Upper Receiver - 300 Blackout - 16" Barrel - 15" MLOK

Complete AR15 Upper Receiver - 5.56 - 12.5" Barrel Carbine - 9.8" MLOK - 4" Pin and Weld Extended Flash Hider

Range Tool AR-15 A1 C7 Stripped Upper Receiver Black

Moriarti Complete Upper Receiver AR-9 9mm 4.5 inch Barrel Straight Profile 1-10 Twist 1/2X36 Thread M-LOK Handguard Multiport Anodized Black Black

Moriarti AR-15 5.56/.223 MLok Upper Assembly Shroud MLok Black 7.5in

FM Products Mike-15 .223 Wylde Gen 2 Complete Upper Receiver 22.25 inch 12.5 inch Barrel Mid Length 1-8 Twist 1/2x28 Thread Free-Float Nitride Black

No Brand BC-15 .458 SOCOM Right Charging FDE Cerakote Upper Parkerized 16" Heavy Barrel 1:14 Twist Carbine Length

No Brand BC-15 7.62x39 Right Side Charging FDE Cerakote Upper 16" Parkerized Heavy Barrel 1:10 Twist Carbine Length Gas

Bear Creek Arsenal BC-10 8.6 Blackout 16in Bolt Action Style Upper Receiver SOCOM Barrel 1-3 Twist M18x1.5 Flash Hider Parkerized

USED Wilson Combat Upper Receiver 5.56x45mm NATO AR-15 Mil-Spec Anodized Black TR-UPPER EDEMO5 Used Condition Fair

LMT MRP Rifle Length AR-15 Quad Rail Upper Receiver

DEMO Spikes Tactical Upper 5.56 11.5in FN CHF w/M4 Handguards & FSP

R&D Precision PW9 9mm Gen 1 Bufferless Upper Kit Black

American Tactical Omni Hybrid MAXX Upper .410 GA 18.5-inch

ATI Galeo Barreled Rec 5.56A-45 18 Barrel for AR Kit

DEMO San Tan Tactical STT-15 Pillar Billet Upper Receiver Black STT-PILLAR-1

M16A1 C7 Stripped Upper Receiver w/ Brass Deflector - No Feedramps