Magpul Version Blue Spring OOB Extractor

[Sgt Minuteman]

I have a serial # DUA Magpul edition version with the blue bolt spring that I fired 180 rounds of Federal bulk pack first time out to range.

I apparently also had an OOB round go off.
A small 1.5" small steel colored spring was laying in the upper reciever I assume this was the extractor spring and the shell casing was blown apart just above the rim. I think the extractor was blown off as well as I compared my bolt to what others have posted and it did not have the extractor piece.

I think my extractor was blown off as every round fired after this stove piped. After 6 stove pipes I went home and called S&W. They mailed me a Fed Ex insured return shipping label, no questions were asked of me. "Just send us the rifle." was all the guy said on the phone. I sent the riffle back.


It should arrive @ S&W this week.

After reading these forums, I wanted to post my experience with the OOB round occuring on a "blue spring" bolt.

I was suprised to have a malfunction like this thinking I was good to go with the blue spring bolt. i think mine only had a blue spring and not the extractor with the anti-rotation fix.

Do the "up to specs" bolts coming back from S&W have blue EXTRACTOR springs as well as a large blue bolt spring?

Do you guys think they would fix hammer springs to prevent OOB strikes?

 

[horn-tail]

what does OOB mean ive never heard that term

 

[chingachkook]

what does OOB mean ive never heard that term

Out Of Battery, in other words the cartridge fired before it was fully chambered.

 

[Rustpot]

Were you rapid firing or did this happen with a failure to return to battery?

The AR15 trigger has no disconnect to stop this from happening I'm aware of and will drop the hammer on a half open bolt.

 

[kennyb]

they will quickly fix it and you will be pleased..

 

[chuck s]

After my rifle made the round trip to S&W six months ago I aggressively polished the chamber. Not had another OBD since then...

-- Chuck

 

[whoppo]

Just curious Sgt... what kind of ammo were you using when this happened?

 

[kilo6echo]

This pretty much confirms that the mp15-22's are hit and miss. You would think by now that all of the bugs and known issues would be resolved. It appears that it may just be a QA issue. I have never experienced a OOB and have shot thousands(knock on wood). I have the old revisions and it's solid.

 

[Sgt Minuteman]

Were you rapid firing or did this happen with a failure to return to battery?

The AR15 trigger has no disconnect to stop this from happening I'm aware of and will drop the hammer on a half open bolt.

Actually I just finished zeroing the weapon and was just target plinking and (no joke) said to my Son, "This weapon is awesome, it's eating this ammo up!"

Then Boom ---OOB!

 

[Sgt Minuteman]

After my rifle made the round trip to S&W six months ago I aggressively polished the chamber. Not had another OBD since then...

-- Chuck

Did you use a Dremel to polish the chamber? Could you explain the process?

 

[Sgt Minuteman]

Just curious Sgt... what kind of ammo were you using when this happened?

Wal-mart federal bulk pack 550. What everyone here seems to think works the best.

Is the CCI shell casings smaller so they will chamber better than the Federal? Should I still use hollow point Federal or switch to FMJ?

I don't want this to happen again.

My son was sitting next to me spotting when it happened, guess I should have had him sit on the left side just to be safer--my fault there, but what if it exploded into someone next to me in the next lane?

Fortunately I was at the end of the row.

 

[Sgt Minuteman]

This pretty much confirms that the mp15-22's are hit and miss. You would think by now that all of the bugs and known issues would be resolved. It appears that it may just be a QA issue. I have never experienced a OOB and have shot thousands(knock on wood). I have the old revisions and it's solid.

I am thinking it had the blue bolt spring, but NOT the fixed extractor.

Can anyone confirm if their Magpul edition 15-22 has a blue bolt spring, but old extractor?