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Posted: 6/16/2009 2:36:16 PM EDT
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I recently built an ar with a S&W M&P lower and a blackthorne products upper. When firing the bolt jams on top of the next round. I am using C products mags ( Green and orange follower). If anyone has any ideas of how to correct this let me know. Thanks
Fred |
| The good news is that if it's trying to work but just doesn't have enough "umph" it's a very fix-able problem. Might just be the "newness" and it needs to be worked a little. I wouldn't panic over the "bad press" Blackthorne gets until you exhaust all other possibilities. |
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I also recently built a rifle using a Anvil Arms lower & a Blackthorne upper & was having the exact same problem.Rifle would eject the 1st round & short stroke & ride up over the second round.It did this to me at the range & I thought it just needed broke in,so I fought with the rifle & ran 300+ rounds thru it & it still would not break in.
I borrowed a friends bolt & carrier group out of his Bushmaster & my rifle ram like a well oiled machine.If your bolt & carrier came from Blackthorne,that it your problem.They are ruff as a cobb & will not break in for some reason. If you have the extra bucks,I would suggest a Fail Zero drop in kit that is totally awsome. |
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