@rambo-6mmrem take off the plastic rear bush, screw the suppressor on tight, now do you have a vernier caliper or a micrometer?......if yes, measure the tapered barrel as close to the end of the suppressor as possible....
this will be the drill size diameter you will need, then screw plastic bush back in suppressor, now you will need a lathe with a 3-jaw chuck, wrap thin cardboard around your suppressor (dont overlap) its just for protection so you dont scratch it....
put correct diameter drill in the tail-stock and slowly drill out the excess material from the bush, chuck speed around 600 RPM should suffice, go slow on break through as sometime the drill will grab.....de-burr both edges.....done!
ive got two DPT suppressors, 3 bushes, did mine this way easy-peasy!!!!!
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