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Posted: 11/5/2014 9:57:56 PM EDT
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I am building a 8.5" .300 blk pistol using a PSA blem lower/upper combo and PSA pistol build kit.(yea, I live 30 minutes from PSA)
I have the gun together, but the bolt will not pull to the rear to cycle the action. I believe it is the buffer retaining pin sticking up too high since the bolt can be pulled back when the takedown pin is pulled and action opened. Should I file it down some, or is there some other problem going on that I haven't "lightbulbed" on yet? |
Before you take a file to the retaining pin, I'd measure how high it sticks up. There should be a groove cut in the bottom of the BCG to go around that pin so it would have to be up very high to stop the bolt carrier.
First thing I would do is remove the buffer tube and retaining pin and see if the BCG will cycle manually when the upper and lower are mated. |
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Quoted:
I am building a 8.5" .300 blk pistol using a PSA blem lower/upper combo and PSA pistol build kit.(yea, I live 30 minutes from PSA) I have the gun together, but the bolt will not pull to the rear to cycle the action. I believe it is the buffer retaining pin sticking up too high since the bolt can be pulled back when the takedown pin is pulled and action opened. Should I file it down some, or is there some other problem going on that I haven't "lightbulbed" on yet? End plate. PSA had an issue with them being too high and interfering with the charging handle. |
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