Shop 4,464 Deals on Upper Receivers

ABC RIFLE COMPANY AR-15 7.62x39mm M-LOK Handguard Complete Pistol Upper Receiver w/BCG And Charging Handle 1-10 Twist 5/8x24 A2 Style Muzzle Brake

CMMG DISSENT Upper Receiver Mk4 300BLK 6.5in 1-7 Twist 5/8x24 Thread Zeroed Linear Compensator Charcoal Green

CMMG MkG .45 ACP Resolute Upper Group Receiver 16.1in Coyote Tan

CMMG Mk4 .22LR Banshee Upper Group Receiver 4.5in 1-16 Twist 1/2 X 28 TPI 12.8in Titanium

Andro Corp Industries AR-15 Upper Receiver with Flash Hider Assembly 350 Legend 24.75in 16in Medium Barrel Carbine 1-16 Twist 5/8X24 Thread 15in M-Lok

Dark Storm Industries DS-15 Typhoon Complete Upper Receiver 5.56 NATO 7.5in Barrel M4 Pistol Profile 1-7 Twist 1/2x28 Thread M-Lok Firestorm Type III

Dark Storm Industries DS-15 AR-15 .300 AAC Blackout 16 inch Upper Receiver Pistol Length 1-8 Twist A2 Style Birdcage Flash Hider OD Green

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

Bear Creek Arsenal BC-15 5.56 NATO 16in Upper Receiver M4 Barrel Carbine Length 1-7 Twist 1/2x28 Flash Hider Parkerized FDE

Bear Creek Arsenal BC-15 .223 Wylde 16in Bolt Action Style Upper Receiver M4 1-8 1/2x28 Flash Hider 416R

ABC RIFLE COMPANY AR-15 7.62x39mm M-LOK Handguard Complete Pistol Upper Receiver w/BCG And Charging Handle 1-10 Twist 5/8x24 A2 Style Muzzle Brake

Grid Defense Complete Upper Receiver 9mm 9x19 Para 5.5 inch 4150 Light HBAR Barrel 1-10 Twist 7 inch Octagon M-LOK Rail Dimpled Flash Can Flat Dark

Grid Defense Complete Upper Receiver 9mm 9x19 Para 16 inch 4150 Light HBAR Barrel 1-10 Twist 14 inch M-LOK Rail A2 Flash Hider Flat Dark Earth

Stag Arms AR-10 Long Range Left Hand Upper Receiver 6.5 Creedmore 24in Barrel HBAR-CMV Profile 1-10 Twist 5/8X24 Thread VG6 Gamma FDE

Jacob Grey Firearms Complete Upper Assembly 9mm 16in 1-10 Twist 1/2x36 Thread Black

Luth-AR 16 in Light Weight Complete Upper Barrel Receiver Assembly - 5.56 1x9 twist MLOK Free Float Handguard Black 16

ABC RIFLE COMPANY AR-15 .300 AAC Blackout Micro Pistol Build 5in Barrel 4in M-LOK Handguard Upper Receiver White

ABC RIFLE COMPANY AR-15 7.62x39mm Micro Pistol Build 5in Barrel 4in M-LOK Handguard Upper Receiver Sniper Grey

ABC RIFLE COMPANY AR9 9mm Luger Pistol Billet 4in Barrel M-LOK Handguard Complete Upper Receiver w/BCG And Charging Handle White

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 .223 Wylde 18in Stainless Barrel 17in M-LOK Rail Complete Upper Receiver w/BCG And Charging Handle Black

POF USA P415 Edge Upper Receiver Assembly 5.56x45mm NATO 34 in Length 10.5 in Barrel 5 Position Adjustable M-Lok Edge Three-Prong Flash Hider Tungsten

CMMG DISSENT Upper Receiver Mk4 300BLK 6.5in 1-7 Twist 5/8x24 Thread Zeroed Linear Compensator Titanium

CMMG Mk4 .22LR Banshee Upper Group Receiver 4.5in 1-16 Twist 1/2 X 28 TPI 12.8in Midnight Bronze