trevoro Posted April 7, 2017 Share Posted April 7, 2017 I had between 500 and a 1000 rounds through my Gen2 MPX when it stopped firing. I inspected the firing pin and found that I couldn't get it to extend past the bolt face. I took pictures and sent them to Sig thinking it had broken. They were great to deal with and sent me an updated bolt carrier and a new firing pin in less than a week, no questions asked. But I couldn't get the new firing pin past the bolt face either! After some fumbling around, I discovered that my Titegroup load had gummed up the bolt. The firing pin has an angled neck before the tip, and that neck had packed the buildup good and tight -- so tight that it felt like metal-to-metal contact pushing the pin through by hand. After scraping it out, the gun is as good as new with the original parts. I guess I should be embarrassed about my poor gun maintenance habits, but mostly I'm just thankful for Sig's customer service. Not only did they take care of a problem that wasn't theirs, they taught me a valuable lesson about the importance of cleaning my junk. Now I feel like I should send them some money for the parts... By the way, I love this gun! Link to comment
bwframe Posted April 7, 2017 Share Posted April 7, 2017 3 minutes ago, trevoro said: I had between 500 and a 1000 rounds through my Gen2 MPX when it stopped firing. I inspected the firing pin and found that I couldn't get it to extend past the bolt face. I took pictures and sent them to Sig thinking it had broken. They were great to deal with and sent me an updated bolt carrier and a new firing pin in less than a week, no questions asked. But I couldn't get the new firing pin past the bolt face either! After some fumbling around, I discovered that my Titegroup load had gummed up the bolt. The firing pin has an angled neck before the tip, and that neck had packed the buildup good and tight -- so tight that it felt like metal-to-metal contact pushing the pin through by hand. After scraping it out, the gun is as good as new with the original parts. I guess I should be embarrassed about my poor gun maintenance habits, but mostly I'm just thankful for Sig's customer service. Not only did they take care of a problem that wasn't theirs, they taught me a valuable lesson about the importance of cleaning my junk. Now I feel like I should send them some money for the parts... By the way, I love this gun! I had what seems to be a very similar problem with my JR carbine. Firing pin fouled in the bolt. Link to comment
psyops Posted April 11, 2017 Share Posted April 11, 2017 As a new PCC owner, this is GREAT info to know.....thanks guys! Link to comment
NinerRider Posted April 13, 2017 Share Posted April 13, 2017 It blows me away how much gunk is in every crevice of my mpx after 800-900 rounds. Maybe it's my reloads but it gets dirty so fast. Link to comment
Nugget Posted April 13, 2017 Share Posted April 13, 2017 (edited) Blow back guns are pig pens. They get dirty super fast. Super dirty. I have to deep clean mine every range trip. Just my standard ar style. Edited April 13, 2017 by Nugget Add Link to comment
Aircooled6racer Posted April 14, 2017 Share Posted April 14, 2017 17 hours ago, NinerRider said: It blows me away how much gunk is in every crevice of my mpx after 800-900 rounds. Maybe it's my reloads but it gets dirty so fast. Hello: That is one of the reasons I went with the AR 9mm platform. They are pretty easy to clean and I hate cleaning. They clean up fast like a pistol and don't have any ports to clog up. Yes they get dirty pretty quick even with some very clean burning powders. Just the nature of the beast. Thanks, Eric Link to comment
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