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Picture of MEshooter
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Purchased my present GEN 2 MPX (have several 20 + 30 rnd GEN 2 mags) Nov.2016 Did some plinking w/ it thru the winter, then finally used it at several USPSA matches here in Maine. Seems i could not finish the match at the last 2 stages. Seems gun would double feed or FTE about 125 rounds into match. Using 124gr Federal or ZQI bullets. Finally called SIG and talked to Mike, he had me ship it to them.Upon return service receipt read:Inspected rifle,replaced gas valve,extractor spring and insert. Tested w/Gold Dot 124gr,no malfunctions thru 50 rnds.Got it back w/ a quick clean, Thought i would load up all my mags 3-30s and 3-20s and run them thru rifle and it still stopped working at about 125 rounds Mad Cleaned it, took it to a recent match and it gave me FTF and FTE again. So between stages i tore it down for a quick piston valve cleaning to get me thru. Side bar:should i be using Lucas oil or Lucas grease on Tappet and in gas block or run it "dry". Any help is appreciated, thanks in advance Confused
 
Posts: 9 | Registered: November 27, 2016Reply With QuoteReport This Post
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So far w/ post at 90+ views w/ no replies, guessing viewers are not shooting an MPX Roll Eyes have i posted this issue in the wrong category Confused Where are all my fellow MPX shooters "hanging out"
 
Posts: 9 | Registered: November 27, 2016Reply With QuoteReport This Post
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Maybe you need to post it in Mason's Rifle Room category.


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Posts: 83 | Location: SE Georgia | Registered: May 14, 2015Reply With QuoteReport This Post
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OK thanks, I'll give it a try
 
Posts: 9 | Registered: November 27, 2016Reply With QuoteReport This Post
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I have had no issues of any kind in either of mine BUT I have only run factory ammo. Not clear if you have the issue with factory ammo, otherwise you know the drill its the ammo. In any case the gas system should not be lubed.


“So in war, the way is to avoid what is strong, and strike at what is weak.”
 
Posts: 6429 | Registered: October 14, 2004Reply With QuoteReport This Post
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At one USPSA match and one (125rnd) test run i was using Federal 124gr and ZQI 124gr bullets when i got FTF and FTE's Roll Eyes
 
Posts: 9 | Registered: November 27, 2016Reply With QuoteReport This Post
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I've no issue using 124g stuff but have you tried to run something a bit zippier like Winchester nato? I do a bit more ammo sampling to see especially if what you've been running has all been from the same batch/lot/mfg.


“So in war, the way is to avoid what is strong, and strike at what is weak.”
 
Posts: 6429 | Registered: October 14, 2004Reply With QuoteReport This Post
sick puppy
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I bought a bunch of leftover MPX mags off another internet friend who sold his because of feed issues that Sig couldn't fix on his gun. Ill ask him what issues he was having exactly and what repairs sig tried


☣Biohazard☣
 
Posts: 6574 | Location: Alpine, Ut | Registered: February 17, 2010Reply With QuoteReport This Post
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Good stuff, thanks for the replies and keep em coming. Cool
 
Posts: 9 | Registered: November 27, 2016Reply With QuoteReport This Post
sick puppy
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I talked to my buddy. He said

"I didn’t have double feed issues, straight up got stuck on the ramp, wouldn’t feed. Had to run no more than 25 in a mag, my MPX had to be spotless and over lubed. It started feeding after around 3 mags worth of miss feeds.
Sig changed a firing pin that broke (yeah that also happened) and sent it back with “found no other issues”."


☣Biohazard☣
 
Posts: 6574 | Location: Alpine, Ut | Registered: February 17, 2010Reply With QuoteReport This Post
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I have a gen 2 I bought from someone else. When I got it, the round count was about 500-600 as per the prior owner.

I have 5 gen 2 mags and 9 gen 1 mags, all 30 rounders.

With that said, I have never had a FTE, but I get FTF at least once per mag, and it doesn't matter which mag.
When it jams, I find the fresh round stuck nose up into the top of the locking lugs, or with just the tip into the chamber and the rim hung up on the bottom.

All my 9mm is speer gold dot 124gr +p factory. (I get it from work)...

When it runs, it will fire as fast as I can pull the trigger, but it may fire 20 rounds and then I get a *click*. I look and the bolt is halfway forward with the round pointing up at a 45* angle. So I drop the mag, and pull the bolt back and most times the round drops free. Sometimes its jammed in hard enough I need to flick it out with my finger and when I look at the round it had a dent in each side of the hollow point where it was jammed into the top of the chamber.

I have cleaned and scrubbed it down with all parts broken down, relubed all parts to Sigs recommended levels, and have also tried it to what I would call "over lubed and very wet". Nothing has fixed it yet.

I may call sig in the near future and send it back. It seems these are hit or miss. Some people will claim they have 5K rounds down the pipe without a single jam, others are like me where you cant get a full mag off without having to clear a FTF or a FTE. It seems there are lots of people complaining and sig is quick to send you a prepaid label to send it back for service. Makes me think there is some design flaw and we will probably see a gen 3 or a retrofit kit offered to fix these problems.


Sig, Colt M-16/M-4/1911 and Glock Armorer.
I love my P229, but if I had to go to a war, I would take my Glock with me...
 
Posts: 551 | Location: LI, NY | Registered: November 26, 2011Reply With QuoteReport This Post
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Thanks for the reply NYresq Cool
 
Posts: 9 | Registered: November 27, 2016Reply With QuoteReport This Post
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