Shop 4,464 Deals on Upper Receivers

Brenton USA Upper Receiver Scout .300 Blackout 18in Barrel 5/8x24 Thread 1-8 Twist Snow MarbleKote Snow MarbleKote

Brenton USA Upper Receiver Scout .300 Blackout 18in Barrel 5/8x24 Thread 1-8 Twist Foliage MarbleKote FoliageMarbleKote

Aero Precision Complete Upper Receiver M4E1-E 5.56x45mm NATO 20in Government Rifle Length 1 in 7 1/2 x 28 15in A2 Flash Hider Cerakote FDE

Aero Precision Complete Upper Receiver M4E1-T 5.56x45mm NATO 16in Pencil Mid Length 1 in 7 1/2 x 28 15in A2 Flash Hider Cerakote FDE

CMMG UPPER GRP RES MK4 5.56X45 NAT 16.1 TUNG CB2D9AE9 CMM

CMMG 9mm Banshee Upper Group Receiver 5in 1-10 Twist 1/2 X 28 TPI 13.7in Coyote Tan

CMMG 9mm Banshee Upper Group Receiver 8in Midnight Bronze

CMMG 5.7X28mm Banshee Upper Group Receiver 8in Sniper Grey

XTS Complete Upper Receiver w/o BCG w/ Ce Rail USA Edition AR-15 16.5in 7.5in Barrel Pistol 1-7 Twist 1/2x28 Thread M-LOK Stainless Steel Bird Cage

Sons of Liberty Gun Works East India Starter Kit Combat Grade FSB 13.7in w/ Front Sight Base Black

Bushmaster ORC II Upper Assembly 16in 5.56 NATO/.223 Remington Black

USED CMMG DISSENT Upper Receiver 5.7x28mm 6.5in 1-9 Twist 1/2x28 Thread Zeroed Linear Compensator Armor Black 57BA8AE-AB EDEMO2 Used Condition Fair

V Seven Harbinger 308 Sbr Complete Upper w/Helios 11.5in 11.5HAR 308SBRH-UR

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

Dark Storm Industries DS-15 Complete Upper 16" Typhoon 5.56 Non Threaded Black 5.56

Bear Creek Arsenal BC15 5.56 NATO 16in Right Upper Receiver M4 Carbine 1-8 1/2x28 Flash Hide Nitride ODG

No Brand BC-15 5.56 NATO Right Side Charging ODG Cerakote Upper 16" Parkerized M4 Barrel 1:7 Twist Mid-Length Gas System

USED Stag Arms AR-10 Stag 10 Upper Receiver Stripped .210 DPMS High Profile Left Hand Type 3 Hard Coat Anodized Black

USED Matador Arms Upper Reciever Montgo 9mm 12.125in 5.5in 1/2x28in Thread Black MAC176 EDEMO4 Used Condition Like New Inspect and Rebox

DEMO LaRue Tactical Upper Reciever Complete .260 Keymod Upper 22 in Barrel Flat Dark Earth Medium DPMS Cut

Vltor Vis Key Mod Slimline 12in Hand Guard Shell Deflector Only Black

Vltor Vis Fusion Carbine 9in with Keymod And Forward Assist Black

Vltor Vis Fusion 10in Carbine Keymod Deflector Only Black

Vltor Vis Fusion Carbine 10in with Keymod And Forward Assist Black