Odd question, sorta, as its not the niche the can was intended for. Most people are sticking these cans on SBRs/pistols,and not full length rifles. Anyone have any experiences with 18-20" AR's and silencers in general? I suspect that the 20" guns gas system is a bit less sensitive to the pressure issues vs shorter guns.
I know that this isn't really the intended use, but making my varmint blaster a bit quieter and mitigating recoil sounds like fun, as long as it runs without too much work.