Worked for a while.... - Precision Armament M4 Muzzle Thread Adapter

This adapter worked... for about 26 months. Even upon installing it, I wondered if it was sturdy enough to last (relatively thin metal versus the 'outer' styles), especially on a 308 (muzzle brake). A few weeks ago, I was testing a new load and on only the fifth shot for the day, it sheared off inside the barrel (about two threads in) and threw the muzzle brake into my chronograph (Competition Electronics DLX, purchased from OP). Thankfully I'd purchased the lexan shield (also from OP) and it saved my chronograph. I've used the heavier 'outer' adapters before (i.e. Kaw Valley, Aim7, etc) for years on other rifles and they've never failed - especially like this. Thus, I ordered and installed the Kaw Valley adapter. Just my insight, YMMV. Good luck...