Shop 4,464 Deals on Upper Receivers

CMMG MkG .45 ACP Banshee Upper Group Receiver 8in Tungsten

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

Dirty Bird AR-15 Stripped Upper Receiver-Blem - Burnt Bronze

CMMG Dissent Mk4 .350 Legend 16.1in Upper Group 1-16 Twist 1/2x28 TPI 25.5.in .750in Midnight Bronze

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

Brenton USA Upper Receiver Tracker .204 Ruger 22in Barrel 1/2x28 Thread 1-12 Twist Autumn MarbleKote Autumn MarbleKote

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

NBS AR-15 Stripped Forged Upper Receiver - T-Marked

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 223/5.56 24.75in 16.5in Carbine 1-8 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride Finish

XTS Complete Upper Receiver w/o BCG w/ 12in Rail AR-15 300 BO 24.75in 16in Barrel Carbine 1-8 Twist 5/8x24 Thread M-LOK Bird Cage Black Nitride Finish

XTS Complete Upper Receiver w/o BCG AR-15 300 BO 19.5in 10.5in Pistol 1-8 Twist 5/8x24 Thread M-LOK Bird Cage Black Nitride Finish Silver

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 Silver

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 Bronze

XTS Complete Upper Receiver w/o BCG w/ Ce Rail AR-15 .223/5.56 19.5in 10.5in Barrel Pistol 1-7 Twist 1/2x28 Thread M-LOK Bird Cage Black Nitride

Lead & Steel All Rounder Carbine 14.5in Mid Length Monobloc Upper Receiver Group Charcoal

Rainier Arms Ruc Pro Mk1 5.56 Nato Partial Upper Receiver Black 12.5 in

Guntec USA AR-15 Stripped Billet Upper Receiver 15 in Air Lite Series Honeycomb M-LOK Handguard Combo Set Anodized Red

Guntec USA AR-15 Stripped Billet Upper Receiver 15 in Air Lite Series M-LOK Handguard Combo Set Anodized Purple GT-UP-SET-PURPLE-15AIRLITE

Wolfpack Armory Upper Receiver Side Charging Stripped Pistol Caliber Black

Rock River Arms 9mm A4 Stripped Upper Receiver

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

USED CMMG Mk4/AR-15 Upper Receiver Assembly Armor Black 55BA290-AB

Black Rain Ordnance Spec Builder's Kit AR-15 5.56mm 16 in Upper Receiver Black

USED POF USA Revolution PD Complete Upper Black Andodized 308WIN 16.5" EDEMO1 Condition Parts Only/Salvage Wrong Product