The "NO GO" gauge is used to make sure a firearm does not have excessive headspace. The bolt should NOT fully close on the "NO GO" gauge, if the bolt cannot be closed on the "NO GO" gauge then you know your rifle does not have headspace that is excessive. The "NO GO" gauge can be thought of as a maximum headspace gauge and should not be able to fit in the rifle's chamber with the bolt fully closed.
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Great quality. Met my expectations. Had Alito of trouble just finding these gauges. These were even on backorder. Haven't used them yet, but dont expect any issues. Will use in a new 6.5 creedmor build on an AR-10 platform.
Apr 10, 2018
Go & no go gauges by Forestor. Nice gauges, very precise and easy to use. Fair price and quick shipping. I'm pleased for sure.
Apr 6, 2018
Ensures your rifle works safely. Definitely an essential item.
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