Shop 4,464 Deals on Upper Receivers

ABC RIFLE COMPANY AR-15 .223 5.56 Complete Build 16in Barrel 15in Lightweight Hybrid M-LOK Handguard Upper Receiver 1-10 Twist 1/2x28 A2 Style Muzzle

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Pistol 7.5in Barrel M-LOK Handguard Complete Pistol Receiver w/BCG And Charging Handle Black

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG

ABC RIFLE COMPANY AR-15 7.62x39mm 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Micro Pistol Upper Receiver w/BCG And Charging Handle

CMMG Mk4 .300BLK Banshee Upper Group Receiver 8in 1-7 Twist 5/8 X 24 TPI 16.5in Sniper Grey

CMMG Mk4 .22LR Resolute Upper Group Receiver 17in Sniper Grey

Brenton USA Upper Receiver Guide 300 HAM'R 18in Barrel 5/8x24 Thread 1-15 Twist Midnight MarbleKote Midnight MarbleKote

Brenton USA Upper Receiver Tracker .223 Remington 22in Barrel 1/2x28 Thread 1-8 Twist Foliage MarbleKote Foliage MarbleKote

TRYBE Defense AR-15 Dust Cover Assembly AR-15 .223 Wylde Engraved TRYBE Defense CIB Cowl Induction Muzzle Brake 1/2x28 Black

Brenton USA Upper Receiver Tracker .22 Nosler 22in Barrel 1/2x28 Thread 1-8 Twist Foliage MarbleKote Foliage MarbleKote

Brenton USA Upper Receiver Scout 6.5mm Grendel 18in Barrel 5/8x24 Thread 1-8 Twist Harvest MarbleKote Harvest MarbleKote

Brenton USA Upper Receiver Scout 6.8 SPC 18in Barrel 5/8x24 Thread 1-10 Twist Autumn MarbleKote Autumn MarbleKote

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

XTS Complete Upper Receiver w/o BCG AR-15 300 BO 24.75in 16in Barrel Carbine 1-8 Twist 5/8x24 Thread M-LOK Bird Cage Black Nitride Finish Red

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 16.5in 7.5in Pistol 1-7 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish OD Green

XTS Complete Upper Receiver w/o BCG AR-15 223/5.56 19.5in 10.5in Carbinel Government 1-7 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish

CMMG Upper Group Dissent 45 Acp 16.1in 1-16 Twist 0.578 X 28 TPI 25.5in Hard Coat Anodized

CMMG Upper Group Dissent Mk47 7.62X39 12.5in 1-10 Twist 5/8 X 24 TPI .750in 22in Coyote Tan

CMMG Upper Group Dissent Mk47 7.62X39 12.5in 1-10 Twist 5/8 X 24 TPI .750in 22in Charcoal Green

American Defense Manufacturing .223 Wylde 16 Inch Barrel M-Lok Rail Upper Receiver Midnight Bronze 16 in

Guntec USA AR-15 9mm Dedicated Stripped Billet Upper Receiver Blue

PSA AK-101 Barrel Assembly - Furniture Ready

USED DEMO CMMG Mk4 Banshee Upper Receiver Group 4.6x30 H&K 8in Armor Black 46B965A-AB EDEMO1 Condition Parts Only/Salvage Wrong Product

APF 450 Bushmaster Carbine 16in Complete Upper Receiver