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I have a c93 that initally started at .013 and has dropped to .007. The original owner has a set of +4 rollers installed already. What size would I need to get the bolt gap up closer to the ideal range? Also, should I go ahead and order a new locking pin if this will help? If so, which one is the correct one for the c93? Thanks for helping out a newbie in advance.
 

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rollers won't fix it. The guns were assembled wrong. They machined the barrel to make it easier to build them.... the barrel is now trash.

You'll need to return it to century or talk to one of our members Ghillybear2000 he's probably fixed 75+ of them now.
 

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True dat...
 
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