The belt clip—two are provided, one for a 1.5-inch belt and one for a 1.75-inch belt—is adjustable for both ride height as well as cant, and is flexible enough to allow the holster to be clipped onto a belt already fastened, meaning you don't have to take the belt off to put the holster on.
Retention is passive, with a single Phillips-head screw providing tension on the trigger guard to retain the firearm. The holster itself is flexible in the mouth to aid in holstering, but rigid at the muzzle to protect the pistol. Oversize rear sights will not be adversely impacted due to the low cut of the A.R.C. holster.