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you DONT make hole bigger...you make bolt smaller..... and you dont need to thread it..slip fit and glued in place was my thoguht...if your internal diameter isnt big enough to fit a bolt of say 9mm...

well agricultural me.....looked at picture and thought...find bolt threaded 1/2"-20 and cut the head off it,see how snugly it fits smooth shaft size into mouth of muzzle bell....drill largest hole...

well it appears Friwi is willing to have a look......job done one would say.

do you include DPT in that "local smiths"?????? also have you looked into the push on models???

try it with subsonics as it is....I did and decided not to bother with suppressor anymore for the 22lr....