Read a post from 2007 mike smith made about a special piston needed for muzzle indexing barrels such as the HP and Cz75. Do these pistons still exist or do we just thread on till the muzzle makes contact?
Specifically I’m using a TiRant 9m on an Arex Zero1T.
Barrel is 1/2x28, .505” Long threads and diameter of barrel is .530”
Thanks in advance for any info