Great price and great to have an alternative source.

Are these what ship with the direct thread VOX?  How many spanner notches around the flange?  Are there any wrench features on the inside, in case the mount unthreads from the can and stays on the muzzle (thinking of recessed application guys, I'd just use the spanner notches).

OST

Those are very nicely machined.  Plenty of counter bore/ chamfer lead in should help with muzzles that lack an adequate thread relief at the shoulder. I particularly like how the spanner notches are cut to capture the spanner tip between the flange and the suppressor tube. This should reduce wrench slipping and recesses sharp edges that are present on other design's orientation.  Plenty of face room for those who like to engrave on mounts.

You should consider posting this in the Omega Modularity thread if you haven't done so already.

Between your 3-lug and this you have some great economical accessories.  Some nice stocking stuffers there.