Shop 4,464 Deals on Upper Receivers

CMMG Upper Group Dissent Mk47 7.62X39 14.5in P&W 1-10 Twist 5/8 X 24 TPI .750in 27.5in Charcoal Green

CMMG DISSENT Mk4 300BLK 14.5in P&W Upper Receiver 1-7 Twist 5/8 X 24 TPI .750in 23.6in Midnight Bronze

Brenton USA Upper Receiver Tracker .224 Valkyrie 22in Barrel 1/2x28 Thread 1-7 Twist Autumn MarbleKote Autumn MarbleKote

Brenton USA Upper Receiver Tracker .224 Valkyrie 22in Barrel 1/2x28 Thread 1-7 Twist Foliage MarbleKote Foliage MarbleKote

Brenton USA Upper Receiver Tracker .450 Bushmaster 22in Barrel 11/16x24 Thread 1-24 Twist Harvest MarbleKote Midnight MarbleKote

Wilson Combat Upper Complete Forged 5.56 NATO Protector Mid-Length 16in Round Q-Comp 1-8 Twist Black Black

CMMG Endeavor 200 MK4 Upper Black 6mm ARC 20 Barrel 10-Rounds Two Magazines

Lead & Steel ARC 5.56mm 16in Upper Reciever Group Mid Length 1-8 Twist Earth

Lead & Steel ARC 5.56mm 16in Upper Reciever Group Mid Length 1-8 Twist Olive

Andro Corp Industries 556 A2M4 Upper 10.3in Black

DEMO Daniel Defense DDM4V7 S URG 5.56 1/7 GOV LPG MFR XS Rail 10.0 DDFS Complete Upper Receiver w/ Flash Hider Black 11.5in

Hera Arms AR-15 Stripped Billet Upper Receiver

USED CMMG Mk3 6.5 Creedmoor Endeavor Upper Group Receiver 24in Coyote Tan 65BFACE-CT EDEMO1 Used Condition Fair

PSA AK-47 GF-3 Barrel Assembly - Furniture Ready Kit

Aero Precision M5 Assembled Upper Receiver Ambi Charging Handle & .308 Black Nitride BCG

DEMO Stag Arms AR-15 Pursuit Right Hand Upper Receiver 6.5mm Grendel 18in Barrel Hanson Profile 1-16 Twist 1/2-28 Thread VG6 Gamma Black

No Brand BC-15 6mm Arc Right Side Charging FDE Cerakote Upper 18" Parkerized Heavy Barrel Mid-length Gas System 1:8

Bear Creek Arsenal BC-10 .308 Winchester 22in Bolt Action Style Upper Receiver Lightweight 1-10 5/8x24 Flash Hider Black Nitride

Bear Creek Arsenal BC-10 .308 Winchester 24in Bolt Action Style Upper Receiver Lightweight 1-10 5/8x24 Flash Hider 416R

USED TRYBE Defense Semi-Complete Upper Receiver AR-15 16in M-LOK .223 Wylde 5.56x45mm NATO Black EDEMO1 Used Condition Fair

Bear Creek Arsenal BC-15 7.62x39 16in Bolt Action Style Upper Receiver Heavy 1-10 5/8x24 Flash Hider 416R

Bear Creek Arsenal BC-10 .308 Winchester 18in Bolt Action Style Upper Receiver SOCOM 1-10 Twist 5/8x24 Flash Hider Parkerized

Vltor Extended Mid-Length Upper Receiver with Bolt Assist Shell Deflector Black

USED Stern Defense AR-15 10in Upper Receiver 8.5in 9mm Barrel MLOK Rail SD BU9 Bolt SD CH1 Charging Handle SD HBC Blast Can Black 015-SD10INCHMOD5-KK