The Griffin Armament PSR (Precision Suppressor, Rifle) DUAL-LOK Flash Hider is a precision DUAL-LOK muzzle device made specifically for the DUAL-LOK PSR suppressors. PSR (Precision Suppressor, Rifle) over the barrel suppressors provide unprecedented blow back reduction, sound performance, and accuracy. The PSR DUAL-LOK Flash Hider is equipped with 3 flash suppressing tines. Also incorporated into the muzzle device, a taper surface to ensure solid lock up and minimal/repeatable POI Shift. The muzzle device integrates 60 machined mounting position locking grooves, which is doubled by the mount's two locking positions, hence the double entendre DUAL-LOK. The mounts' two locking positions are machined out of phase of one another by 3 degrees which provides the 120 effective locking positions and ensures a tightly mounted and locked suppressor. When the suppressor is installed, only one of the two positions will generally function by allowing the spring to push the locking co...