Shop 4,464 Deals on Upper Receivers

Troy CQB-SPC Upper 5.56mm FDE

ABC RIFLE COMPANY AR-15 Micro Pistol Build 5.56x45mm NATO 5in Barrel 4in M-LOK Handguard Upper Receiver White

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel Custom 5in Top Cut Custom M-LOK Handguard Complete Upper Receiver w/BCG And Charging

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol 5in Barrel M-LOK Handguard Upper Receiver w/BCG And Charging Handle Burnt Bronze

ABC RIFLE COMPANY AR9 9mm Luger Rifle Billet 16in Barrel M-LOK Handguard Complete Upper Receiver w/BCG And Charging Handle Cerakote Flat Dark Earth

ABC RIFLE COMPANY AR-15 .223 Remington/5.56x45mm NATO Pistol 10in Quadrail Handguard Complete Upper Receiver w/BCG And Charging Handle Red

ABC RIFLE COMPANY AR-15 5.56x45mm NATO 16in Barrel 12in Quad Rail Upper Receiver 1-8 Twist 1/2x28 A2 Style Muzzle Brake Nitride Cerakote Flat Dark

Brenton USA Upper Receiver Tracker 6.5mm Grendel 22in Barrel 5/8x24 Thread 1-8 Twist Snow MarbleKote Snow MarbleKote

Brenton USA Upper Receiver Scout .350 Legend 18in Barrel 9/16x24 Thread 1-16 Twist Autumn MarbleKote Autumn MarbleKote

Brenton USA Upper Receiver Tracker .350 Legend 22in Barrel 9/16x24 Thread 1-16 Twist Harvest MarbleKote Harvest MarbleKote

TRYBE Defense Complete Upper Receiver AR-15 16in M-LOK .223 Wylde 5.56x45mm NATO Black w/ Charging Handle and BCG

Next Level Armament Horus AR-15 9mm Luger 16 inch Upper Receiver Conversion Kit Black with 33 Round Magazine

Next Level Armament NLX .308 AR-10 Billet Upper Receiver Stripped Right Hand Gen 2 Anodized to Mil-Spec Black

POF USA Revolution Piston Upper Receiver 308 WIN 18.5in Barrel Rifle Length 1-10 Twist 5/8x24 14.5in M-Lok Rail Triple Port Muzzle Break Burnt Bronze

Aero Precision Complete Upper Receiver M4E1-E 16in .223 Wylde SS Mid Barrel Quantum 12in M-LOK Handguard Flat Dark Earth

Aero Precision Complete Upper Receiver M4E1-T 5.56x45mm NATO 16in Government Mid Length 1 in 7 1/2 x 28 12.7in A2 Flash Hider Anodized Black

CMMG DISSENT Upper Receiver 9mm 6.5in 1-10 Twist 1/2x28 Thread Zeroed Linear Compensator Midnight Bronze

CMMG Mk4 Resolute Upper Receiver Group 7.62x39mm 16.1in Armor Black

CMMG Mk4 .22LR Resolute Upper Group Receiver 17in Coyote Tan

CMMG Mk10 10mm Banshee Upper Group Receiver 8in Midnight Bronze

Evolve Weapons Systems Assembled Upper Receiver 11.5in Carbine Gas System M-LOK Handguard Black

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 Red

Dark Storm Industries DS-15 Typhoon Complete Upper Receiver .300 Blackout 7.5in Barrel M4 Pistol Profile 1-8 Twist 5/8x24 Thread M-Lok FirestormType

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