BRN-180s no go

[oldfatguy]

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

 

[Downtown]

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.

 

[oldfatguy]

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.

Interesting that the thread is gone. 300BLK pistol with folding brace would be the bees knees.

OFG

 

[Downtown]

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?

 

[BurnOut]

Man, this is disappointing... I really want the BRN-180s to work; it's a cool concept that allows for some flexibility in the AR platform.

 

[oldfatguy]

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

 

[Downtown]

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.

 

[oldfatguy]

Known issues are short stroking until broken in and barrels loosening.....

Ok, how many rounds till “broken in”? 300 BLK is a bit hard to find right now so not wanting to burn through several hundred rounds on the hope that it will eventually run 100%. Even dies are backordered and powder out of stock.

OFG

 

[Downtown]

Not sure how many rounds. That information just came from Googling BRN-180 failures and reading a few posts.