BRN-180s no go

oldfatguy

Sergeant
Full Member
Minuteman
Nov 6, 2008
1,212
180
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Huntsville, AL, USA
Really wanted BRN-180s 300 BKL to work. But wouldn’t run with FOG 220 subs. Called vendor and was told to try different mags. 11 different mags from 4 manufacturers same results. One round & FTF, at most 4 rounds then FTF. Also several light or no primer strikes. Lower is 100% with Hardened Arms DI upper. Anyone have one that runs?

OFG
 
There was another thread with the exact same issue on August 31. The link shows up in a Google search, but it's missing on the Hide. Wonder what happened.
 
I think that thread might have mentioned some possible solutions. I do know an noted issue has been barrel loosening. Could increased headspace cause the light primer strikes?
 
Didn’t check for loose barrel. Only ran 70 rounds of Unicorn teeth thru it and the light/no primer strikes, a half dozen, were random throughout. IMHO it was very “under gassed” if that applies to a short stroke piston. The one shot with it set on setting #2 failed to cycle at all. Only tried 220 grain subs as I don’t have any rare supers.

OFG
 
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Known issues are short stroking until broken in and barrels loosening. I think these are just teething pains and they'll get it sorted out. Not like it's a new concept. I've forgotten those early designs that the Magpul Masada came from, but there were cool magazine covers twenty years ago.