The mini q.D.Flash hider is for yhm's fast attach sound suppressor systems.Compact at only 2 1/8" and weighing in 3.3 ounces the mini q.D.Flash hider was designed for today's competitive shooter.No short cuts were taken and users will find that the mini q.D.Flash hider is still capable of being shot comfortably unsuppressed as well as suppressed.Flash hider is compatible with- turbo t2's turbo k's resonator's resonator r2's resonator k's nitro.30 all phantom.30 caliber suppressors as well as our new r9 9mm and nitro n2o sound suppressors.The device should be torqued to between 20 and 30 ft-lbs.Finish: Black PhosphateModel: Mini QDThread Pattern: 1/2"-28 tpi