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SIg MPX-K

1232 Views 9 Replies 7 Participants Last post by  pstod
I just bought a brand new (built in Feb 2022) Sig MPX-K model with the Timney Trigger. I called Sig shortly after my purchase to verify thread pitch on the muzzle device (birdcage) They told me it's the newest model produced and it has a thread pitch of 1/2x28, not the 13.5x1 pitch found on older models. I went to remove the birdcage and no go. I've changed out many flash hiders and muzzle breaks. That sucker is not coming off! I read it's rocsetted on there so I boiled it to no avail. I have in soaking and will try again tomorrow. I'm hoping it is indeed threaded 1/2x28 like sig told me on Thursday and not LH 13.5. I do not want to damage a brand new gun! Any insight would be helpful!
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Have you tried both directions? The 13.5x1 was a left hand thread and the 1/2鈥漻28 is right hand. 馃
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I wouldn鈥檛 trust that CS. I would call back. That doesn鈥檛 make any sense that they would change it. Gen 3 guns have been 13.5LHx1. If yours is 1/2鈥漻28 RH it would be the first I heard of.
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I have a Gen 3 MPX as well, and while I haven't changed out the muzzle device (yet), I've always been under the impression that it is 13.5x1 LH
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I just bought a brand new (built in March 2022) Sig MPX-K model with the Timney Trigger. I called Sig shortly after my purchase to verify thread pitch on the muzzle device (birdcage) They told me it's the newest model produced and it has a thread pitch of 1/2x28, not the 13.5x1 pitch found on older models. I went to remove the birdcage and no go. I've changed out many flash hiders and muzzle breaks. That sucker is not coming off! I read it's rocsetted on there so I boiled it to no avail. I have in soaking and will try again tomorrow. I'm hoping it is indeed threaded 1/2x28 like sig told me on Thursday and not LH 13.5. I do not want to damage a brand new gun! Any insight would be helpful!
The Sig Sauer website clearly says for MPX-K SIG MPX K | SIG SAUER scroll down to spec's under model number and you'll see treaded stated M13.5 x 1 mm even shows Timmey Trigger in single stage, hope this helps.
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The MCX is 1/2x28 RH. This is not the first time someone has confused them with the MPX. There is no reason to change from SIG's point of view for SIG's suppressors on the MPX.

My advice is to assume that LH threads are involved. SIG's product page still says 13.5 threads.

Bill
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I called customer service and gave them the serial number to my gun and it was built Feb 2022 and the customer service rep told me it was 1/2x28 now. I read everywhere on the own website it says 13.5x1 LH but was watching a video and they stated it was changing or changed so that's what made me call Sig. She confirmed my serial number and all.....I am assuming she made a mistake......figured i'd check here first.
Well, I went back out in my shop and got it off. I let the rocksett sit and it is definitely 13.5 LH thread! I can't believe sig customer service actually told me it was 1/2 28! Glad I took my time and didn't force it or over-torque it and asked questions here first! It was impossible for them not to know what gun I had because the first thing she asked for was my serial number! Thanks for all the comments and help!
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Contrary to popular belief, OP鈥檚 experience with CS is very much like my experiences with CS until you can get to the next level. Pays to be patient.
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Contrary to popular belief, OP鈥檚 experience with CS is very much like my experiences with CS until you can get to the next level. Pays to be patient.
Unbelievable because I gave them the serial number of the firearm. If I didn't do that then there could have been confusion!
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