daNattyFatty
Ultimate Member
This morning at the range, my 11.5" ar15 experienced 6, what I believe to be, failures to extract. The fired casing was either still completely inside the chamber, or like a 1/2 inch extracted, with the next round attempting to be fed into the chamber. I cleared each one easily, by dropping the mag and running the charging handle. This stoppage happened on each of the four mags that I used. Here are the pertinents:
Upper was bought as a complete BCM 11.5" 5.56.
Bolt Carrier is BCM, full auto.
Bolt is BCM mpi and hp. I have not changed any o-rings or springs in the extractor.
Buffer is a Vltor A5-4
Buffer spring is Sprinco green
Lower is a Stag.
Ammo is IMI Independence 5.56
Mags are USGI 30 rd, with magpul anti-tilt followers.
This rifle was brought to one of Chad's armorer classes and was "within tolerances" I guess is the way to put it.
A month ago, I used these exact same mags and ammo in a bone-stock M&P15 and did not experience any stoppages. For various reasons, this is only the second time that I've taken this SBR to the range. The first time was almost 2 years ago. I don't remember any stoppages or which mags I used (lesson learned for not taking notes). But I can guarantee that the ammo was M193.
I did not think to examine the case rims from today for any damage. I also did not perform any diagnostics while at the range, just cleared the stoppage and kept firing. I do plan on going back to the range with this particular rifle, hopefully next week, where I can test different mags and ammo through this rifle, as well as any tests that you all can suggest.
So, with all that said, can anyone point me in possible directions, please?
Upper was bought as a complete BCM 11.5" 5.56.
Bolt Carrier is BCM, full auto.
Bolt is BCM mpi and hp. I have not changed any o-rings or springs in the extractor.
Buffer is a Vltor A5-4
Buffer spring is Sprinco green
Lower is a Stag.
Ammo is IMI Independence 5.56
Mags are USGI 30 rd, with magpul anti-tilt followers.
This rifle was brought to one of Chad's armorer classes and was "within tolerances" I guess is the way to put it.
A month ago, I used these exact same mags and ammo in a bone-stock M&P15 and did not experience any stoppages. For various reasons, this is only the second time that I've taken this SBR to the range. The first time was almost 2 years ago. I don't remember any stoppages or which mags I used (lesson learned for not taking notes). But I can guarantee that the ammo was M193.
I did not think to examine the case rims from today for any damage. I also did not perform any diagnostics while at the range, just cleared the stoppage and kept firing. I do plan on going back to the range with this particular rifle, hopefully next week, where I can test different mags and ammo through this rifle, as well as any tests that you all can suggest.
So, with all that said, can anyone point me in possible directions, please?