5.56

Trijicon ACOG 4x32mm Scope

Geissele Reliability Enhanced Bolt Carrier Group – 5.56mm – Nanoweapon

Geissele CHF Chrome Lined Barrel – 5.56 – 12.5″

Geissele URG-I Airborne Charging Handle 5.56 – Black

Geissele Reliability Enhanced Bolt Carrier Group

Rosco Bloodline 5.56 NATO Mid-Length Barrel – Multiple Options

Rosco Bloodline M4 5.56 NATO Barrel – Multiple Options

Trijicon ACOG 4×32 ECOS, Center Amber Crosshair 5.56 & 3.25 MOA Red RMR Automatic LED Type 2 – Cerakote FDE

Geissele Reliability Enhancement Kit – Model Options