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Old 07-08-2013, 5:21 AM
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bruss01 bruss01 is offline
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Default New 308 AR Build - Bolt Catch Not Working Reliably

*** UPDATE ! Problem solved! See post #25 below ***

I just built not one but TWO 308 AR's and both of them are displaying the same behavior. The rifles have been assembled but have not been out to be fired yet, this is all just manually cycling the action.

For the record, the receivers are Sun Devil 308 (DPMS pattern) matched billet upper/lowers with nickel/teflon coating, the bolt is the JP Enterprises Low Mass, and the bolt catch is a DPMS type 308-specific bolt catch.

If I pull the charging handle back slowly with an empty mag inserted, I can *sometimes* get the bolt catch to engage. Also I can sometimes coax this engagement with a mag removed, while pressing on the bolt release ( the small end of course). This engagement is not reliable, with the bolt going forward unexpectedly more often than not. The other rifle does not engage at all, just hesitates slightly as if it were going to catch, as the bolt proceeds to slam home.

Can anyone advise me on what/where to check to determine what is going on and how to remedy the issue? Thanks.
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Last edited by bruss01; 07-12-2013 at 8:26 AM..
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