I'm building my first form 1 suppressor, and want to go to with 1.375x24 (Hub) threads. I'm finding conflicting info on the major and minor diameters. One source is showing 1.370 major and 1.335 minor, theoretical machinist is showing 1.372 major, but 1.319 minor. The major diameters are close enoug...

I'm planning on building a form 1 for the first time primarily for my 300 blackout and 458 socom ARs. However, I'd like the option of running it on some of my pistols, so looking at buying a booster assembly with 1.375x24 threads. Was looking at the griffin booster assembly with ez lock for the pist...

Here to learn and bounce ideas before I burn good material! Have a griffin Optimus micro, and want to look into building a do all 45 can for 458 socom, 300 blackout, and maybe occasional 9mm.