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Discussion Starter · #1 ·
Have an old match MP5 who's bolt gap is nearing .25mm (at .28mm)

It's probably got 10k rounds through it AFTER I got it and it was in poor condition.

I added +8 rollers to it and the gap is now at 0.38mm but the rollers don't slide into the locked or out of the locked position without a bit of pressure. Feels like it almost snaps into locked and out of.

Could this cause any problems, failure to cycle?
 

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+8 sounds like its just a hair too big for the roller slot in the bolt head, it should break in fairly quickly. +6 is another option.
Bill
triggerwork.net
 
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