Shop 4,462 Deals on Upper Receivers

Aero Precision M5E1 Enhanced Upper Receiver Assembled LR-308 Aluminum Olive Drab Green

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

Aero Precision EPC-9 Standard Upper Receiver Assembled AR-15 9mm Luger Last Round Bolt Hold Open Aluminum Olive Drab Green

Del-Ton Rifle Kit 5.56 16 Barrel MLOK Handguard

Sons of Liberty Gun Works Half Complete Upper Receiver M4-89 5.56mm 11.5in 10.5in Combat Barrel M89 Rail A2 Flash Hider No BCG or CH Black

Faxon Ascent AR-15 Complete Upper Receiver 350 Legend 16" Barrel

Primary Weapons Systems MK109 MOD 2-M Pistol Upper Receiver .300 AAC Blackout 9.75in Barrel 1-8 Twist Matte Black

Troy A4 Complete Upper 5.56 NATO / .223 Rem 10.5 Barrel

Aero Precision M4E1 Assembled Upper Flat Dark Earth .350 Legend 16 Barrel

Del-Ton Dissipator Pre-Ban Heavy Profile Flat Top Barrel Assembly 16in Standard/Rifle

Sons of Liberty Gun Works Broadsword-89 Upper Half 18in .223 Wylde Precision Barrel BS UPPER 16.75in M89 Rail Optional To AddMuzzle Device BCG or CH

Aero Precision AR-15 M4E1-T Upper Receiver Assembly 5.56x45mm NATO 16" Barrel Mid-Length Kodiak Brown

CMMG Banshee 12.50" Upper 8.6 Blackout 1:3, Armor Black

Stern Defense AR-15 SD 15 MOD5 Upper Receiver Assembly 45ACP 6" M-LOK

Aero Precision M4E1 Complete Upper Receiver .223 Wylde Mid Barrel EM-15 HG No BCG/Charging Handle Gen 2 Anodized Black 16in APAR600251M9

Luth-AR 16" Railed Upper 5.56x45mm 1:7 Carbine-Length w/BCG&CH, Black

Noveske N9 RECON Upper 9mm 16 Barrel w/ Tri-Lug

Alexander Arms Hunter 18" Upper 6.5 Grendel 1:8, Black - UHU65BL

Primary Weapons Systems MK116 MOD2-M Upper Receiver 16in bbl .223 Wylde 3-Setting Adjustable Gas System FSC556 Compemsator Black

Radian Weapons Upper/Handguard Set OD Green 5.56 8.5 MLOK Handguard

Radian Weapons AX556 Builder Kit Brown 5.56

Aero Precision M5E1 Complete Upper Flat Dark Earth .308 Win 18 Barrel

Aero Precision AR-15 M4E1-T Upper Receiver Assembly 5.56x45mm NATO 16" Barrel Mid Length Flat Dark Earth

Aero Precision M5 Complete Upper Receiver w/Flash Hider 18in .308 Rifle Barrel w/ATLAS R-ONE 15in M-LOK Handguard Anodized Black