Shop 4,464 Deals on Upper Receivers

CMMG Dissent Mk4 6mm ARC 16.1in Upper Group 1-7.5 Twist 5/8 X 24 TPI .750in 25.5in Sniper Grey

CMMG Mk3 6.5 Creedmoor Endeavor Upper Group Receiver 20in Coyote Tan

CMMG 5.7X28mm Banshee Upper Group Receiver 8in Titanium

CMMG MkGs .40 S&W Banshee Upper Group Receiver 8in Titanium

CMMG MkGs .40S&W Resolute Upper Group Receiver 16.1in Midnight Bronze

CMMG Mk4 .350 Legend Resolute Upper Group Receiver 16.1in Tungsten

VKTR Industries VK-1 5.56x45mm NATO 11.5 inch Upper Receiver Heavy Carbine Length 1-7 Twist Sniper Grey

VKTR Industries 10.5in VK-1 Complete AR-15 Upper

VKTR Industries 16in VK-1 Complete AR-15 Upper Cerakote FDE

CMMG Mk10 10mm Banshee Upper Group Receiver 8in Sniper Grey

CMMG DISSENT Mk4 300BLK 16.1in Upper Receiver 1-7 Twist 25.5in 5/8x24 TPI .750in Titanium

CMMG DISSENT Mk4 300BLK 16.1in Upper Receiver 1-7 Twist 25.5in 5/8x24 TPI .750in Armor Black

CMMG Dissent Mk4 5.56mm 16.1in Upper Group 1-7 Twist 1/2 X 28 TPI .750in 25.5in Tungsten

CMMG Resolute 200 MK4 Upper 6mm ARC 16.1 Barrel

Next Level Armament NLX .450 Bushmaster Complete Upper Receiver 18 in Barrel 1/24 Twist M-LOK Handguard Machined Stainless Black

Chiappa 500093 M4-22 Gen II Pro Upper 22 LR 16 in Steel Barrel, Matte Black Polymer Receiver, 7.80 in Quad Picatinny Rail For Use With Mil-Spec Lower Receivers Includes 2 28rd, Magazines

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

Brenton USA Upper Receiver Scout 6mm ARC 18in Barrel 5/8x24 Thread 1-7.5 Twist Midnight MarbleKote Midnight MarbleKote

Brenton USA Upper Receiver Scout .450 Bushmaster 18in Barrel 11/16x24 Thread 1-24 Twist FoliageMarbleKote Foliage MarbleKote

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

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

CMMG Upper Group Dissent 45 Acp 16.1in 1-16 Twist 0.578 X 28 TPI 25.5in Coyote Tan

CMMG Upper Group Dissent 45 Acp 6.5in 1-16 Twist 0.578 X 28 TPI Coyote Tan

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