Fletcher Rifle Works Glasspack Flash Hider 1/2-28 Sig Taper

The Glasspack is Fletcher Rifle Works' flash hider built around a taper mount interface. It threads on at 1/2-28, the common pitch for 5.56 barrels, and uses the Sig taper shoulder to index a suppressor square to the bore.

Taper mounts seat metal on metal against a matching cone, so the can lands in the same place every time it goes back on and there is no gap for carbon to build up behind. Used by itself the Glasspack works as a flash hider on any 1/2-28 barrel. Check that your suppressor or mount adapter uses the Sig taper pattern before ordering, and check the thread pitch and shoulder cut on your barrel.