Kinda wish I had gone .308 , now I need another. I think for the sound you can suppress do it by caliber ( there was a thread started here recently about that ) , maybe not : others will chime in on that I'm sure. The 5.56 is good for all my AR's but the .300 Black Out and my FAL. It is just as good for my .22's rifles and pistols and .17's pistols and rifles , not to mention easy as hell to clean. A bad strike leaves the serial numbered part intact ( part of the rear blast chamber that threads to the host , least likely to be damaged ) ; you can get free replacement parts unless your story to Huntertown is unbelievable ( Like I swear I shaved down the .30 projectile to clear the 5.56 can, WELL IT WONT ! and you would need a thread adapter anyways BARREL LENGTHS AND SUBSONIC OVERWEIGHT TUMBLER'S HAVE ALOT TO DO WITH IT AS WELL ; especially if Subsonic. Buy it for it's purpose , go down in caliber , never try to make bigger bores work with mods and never use rifle loads like 5.56 to work in a mini pistol .22 Silencer.