OSS 2138H

An extremely rugged suppressor, the HX-QD 556 updated with our newly designed flash cap is built with patented and proven OSS Flow-Through technology, delivers hearing safe mid-130s dB and zero flash performance, is full-auto rated, easily passes the USSOCOM Reliability Stress Test, and has no minimum barrel restrictions it's the ideal suppressor for all 5.56 rifles.
Compatible with Muzzle Brake-QD 556 and Flash Hider-QD 556.
WEIGHT 17.3 oz
LENGTH 6.67 in
DIAMETER 1.60 in
Materials & Finish: Unlike traditional suppressors that manage trapped gas, intense heat and pressure with blast baffles, OSS Flow-Through technology redirects expanding gases forward allowing us to use 17-4 stainless steel deflectors and internal Grade 5 Titanium coils. The result is a remarkably cooler and extremely durable suppressor. The HX-QD 556 has a fully-welded outer body made of 17-4 heat treated stainless steel coated with C-series high temperature black Cerakote.
Sound Pressure Levels: The HX-QD 556 is the optimal choice for the widest range of 5.56 caliber rifles. Sound pressure levels are measured at the shooters ear to comply with current military specifications:
130-134 dB on 20" AR15 DI using commercial grade 55 gr ammo
133-137 dB on 16" AR15 DI using commercial grade 55 gr ammo
138-142 dB on 10.5" AR15 DI using commercial grade 55 gr ammo