Keep an eye on your SOW NiBor BCG

[392heminut]

Those bolts had actually had more than 1K rounds through each one of them but how much more I couldn't say.

[98Z5V]

Larry - I fucked up.  I though it was 1k that you posted.  When I look at it again, it's "under 10k."  BIG difference!...  My bad.  :yup:

 

 

i saw this while browsing the forums.

 

But, you said you'd never seen this type of crack before - did you find that thread after you made that post?

[survivalshop]

Hey Survivalshop, I get your point that this could have been an issue that kept building upon itself with the other issues.  I have just never seen this type of crack before and neither has the guy who made and tested the new upper assembly or Clint at heavy buffers.  I am not blaming SOW for a bad part just saying that if you have one to keep an eye out just in case.  

 

Did you ever figure out why your rifle would function properly with pmags?  I am guessing the slide not catching on an empty mag?

 

Anyone use the JP enhanced bolt with a short gas system?  I have one of their low mass BCG in a 22" rifle and functions flawlessly.

   I believe because it was an early made CMMG Billet 308 Lower / SI Defense ,Gen. II Billet ,Upper & PMags were just a thought for 308AR's , it was made to work with Steel Mags , which it does , works fine with every Metal Mag. I put in there , but for some reason , PMags are not reliable in it . I fixed it by switching out both Upper & Lower Receivers . Yes, Basically a New rifle  <laughs> ,But works with all Brand/type Mags now. ( You could call it " Tolerance Stacking " )

  I've been woking on a fix for the CMMG / SI Defense Receivers & when I get a Barrel , I can see if it works .