I am new to building AR rifles but have recently undertaken to build four of them.
The two AR-15's went together fine. Under manual handling, operation is exactly by the book.
However, the two 308 builds (beautiful though they are) are having issues with the bolt catch.
I just built these 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 308-specific DPMS type 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.
Can anyone advise me on what/where to check to determine what is going on and how to remedy the issue? Thanks.
