5.56x45mm NATO Receivers

Daniel Defense MK18 AR-15 Pistol Complete Upper Receiver 5.56mm NATO 10.3" Barrel Flat Dark Earth

Daniel Defense MK18 AR-15 Pistol Complete Upper Receiver 5.56mm NATO 10.3" Barrel Black

Geissele USASOC URG-I Near Clone AR-15 Complete Upper Receiver 5.56x45mm NATO 14.5" Pinned Barrel

Daniel Defense DDM4v7 S AR-15 Complete Upper Receiver 5.56x45mm NATO 11.5" Barrel

Daniel Defense DDM4v7 AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel

Faxon Forged Stripped AR-15 Upper Receiver Aluminum Black

BCM MOD-0 AR-15 Complete Lower Receiver Black

Sharps Bros Warthog AR-15 Stripped Lower Receiver Anodized Black

Radian Weapons A-DAC 15 Builder Kit 5.56 14 Handguard

Daniel Defense DDM4v7 Pro AR-15 Complete Upper Receiver 5.56x45mm NATO 18" Barrel

Daniel Defense DDM4v7 Lightweight AR-15 Complete Upper Receiver 5.56x45mm NATO 16" Barrel

Radian Weapons A-DAC 15 Complete Lower 5.56 / .223 Rem w/ SBA3 Brace

CMMG Mk4/AR15 Stripped Lower Receiver Armor Black

Sharps Bros Overthrow AR-15 Stripped Lower Receiver Anodized Black

Sharps Bros Hellbreaker AR-15 Stripped Lower Receiver Anodized Black

Geissele AR-15 Super Duty MOD1 Complete Upper Receiver 5.56x45mm 16" Cold Hammer Forged Barrel M-LOK DDC

FightLite Industries Mission Configurable Rifle Complete Upper 5.56 16.25 Threaded Barrel

Diamondback DB15 Lower Black Multi-Cal

Smith & Wesson M&P15 AR-15 Complete Lower Receiver Black

Radian Weapons Model 1 Builder Kit Flat Dark Earth 5.56 14 MLOK Handguard

Spikes Tactical No Logo Multi-Caliber Stripped Lower

BCM BCM4 AR-15 Complete Lower Receiver Anodized Flat Dark Earth

Bravo Company BCM M4 Assembled AR-15 Upper Receiver Aluminum

Aero Precision M4E1 PRO Lower Kodiak Brown 5.56