It does need to be pretty precise to fit.B est if the manufacturer can do it or give him the reading of your barrel at the point the bushing will sit on your barrel.
Having said that some guys dont use the rear bushing and have had no alignment issues to date but I guess if a manufacturer builds it with one then you might not be covered if you do get misaligned and have a strike.
Im sure there are a few guys on here not using the bushing.
Give DPT an email he replys quickly and has been great to deal with.
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