This comes in three models; the regular, slim, and micro version flashcan.
Made from aircraft grade 6061 aluminum our flash can is a single piece muzzle device that re-directs the muzzle flash, gases and concussion forward, away from the shooter. The flash can is type III hard coat anodized.
The flash can has 3/4 wrench flats.
The regular and slim:
Outside Diameter: 1.75"