Cmmg bho


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hapidogbreath
December 24, 2011, 09:00 PM
I put out some heavy coin for a CMMG upper with the BHOA option and 2 mags. Mags needed to be worked in to even feed and I still can't get the bolt to stay open on the last round. Does anyone out there have any idea how long this takes to break in or did I get a lemon. Have tried it on a DPMS lower and a RUGER.

Any help would be great!:)

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