Sorry if this has been beat to death but I wanted to ask a direct question instead of go through endless internet forums. I have an m39 which has no issues. My brother recently picked one up because he liked mine a lot. Issue with his is random misfires which I believe are being caused by light primer strikes. I checked the firing pin protrusion with the tool which came with mine and his firing pin does not reach to the top of the 1st gap for measurement. Needless to say the second measurement is also quite short.
I began adjusting the firing pin to meet the minimum protrusion length and though I had it all set. Once the bolt was back together, the rear end of the firing pin was no longer flush with the rear circular part on the bolt. The rear of the firing pin was noticeably recessed into the bolt. Mine is flush and lines up with the two hash marks on the back of the bolt.
Is it necessary for the rear of the firing pin to be flush with the rear of the bolt? If so, is this firing pin needing replacement?
Thanks for any help.
I began adjusting the firing pin to meet the minimum protrusion length and though I had it all set. Once the bolt was back together, the rear end of the firing pin was no longer flush with the rear circular part on the bolt. The rear of the firing pin was noticeably recessed into the bolt. Mine is flush and lines up with the two hash marks on the back of the bolt.
Is it necessary for the rear of the firing pin to be flush with the rear of the bolt? If so, is this firing pin needing replacement?
Thanks for any help.