Most likely yes.
If I use another bolt carrier with my current bolt on a PTR 91 will it change the headspace ?
Thanks in advance
If you are using the same bolt,rollers and locking piece you should still check the bolt gap, I have done the same and have some bolt swaps that are ok but that's not always the case, I swapped out a bolt with a used HK factory bolt using the same rollers & locking piece and the bolt gap changed considerably, so double check that gap. This is just my personal experience, others may have never had any differences in the bolt gap when swapping carriers.
Last edited by GregAB; 04-26-2020 at 06:53 PM.
It depends on the spec tolerance of the bolt, locking piece and carrier. Tolerances can stack also used parts wear.
It your rifle is near the end ranges of the bolt gap it could put you under or over.
Anytime you change the bolt group or barrel on any firearm check the headspace or bolt gap on a roller locker before firing.
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I guess, Yes.
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Thanks to everyone