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SIG SAUER MPX (Update: Exclusive Non-NFA version P7) Login/Join 
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I wish they made a Cammenga Easy Loader for the MPX. I use one for my MP5 and you can load 20 rds with one pull.
 
Posts: 17 | Registered: November 21, 2008Reply With QuoteReport This Post
Junior Member
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I noticed your loading Freedom Munitions. My Gen 2 won't run with Freedom Munitions 147 Gr, new rounds even when suppressed. Does like most other brand 147's though.
 
Posts: 3 | Registered: November 13, 2016Reply With QuoteReport This Post
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quote:
Originally posted by Ballistico:
I noticed your loading Freedom Munitions. My Gen 2 won't run with Freedom Munitions 147 Gr, new rounds even when suppressed. Does like most other brand 147's though.


I have issues with a few of my firearms with their re-man'd 147 grain but no issues with their new stuff. Have you tried any other firearms with their re-man'd stuff?
 
Posts: 57 | Registered: June 08, 2015Reply With QuoteReport This Post
For real?
Picture of Chowser
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My gen2 (date on box is 11/18/16) does not like Freedom's 147 either. It will eat their American Steel 115 and Winchester Ranger 124+P just fine.
I have some WWB 147 somewhere and a few cases of Winchester USA 124gr FMJ enroute.

Going to look for some gen1 mags on sale.

Debating a barrel chop to 5" and rethread instead of buying a metric piston.

I have no issues with FM's 147 reman in my AR9 (4" sbr) suppressed or unsuppressed. It also runs fine in my Glock 19, Beretta 92F, Ruger 1911 and HK VP9 (suppressed and unsuppressed)



Not minority enough!
 
Posts: 5006 | Location: South of Cleveland, OH | Registered: August 09, 2007Reply With QuoteReport This Post
Thank you
Very little
Picture of HRK
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I've shot both new and reman through it without issues



"My rule of life prescribed as an absolutely sacred rite smoking cigars and also the drinking of alcohol before, after and if need be during all meals and in the intervals between them." Winston Churchill
 
Posts: 10846 | Location: Mouseville, FL | Registered: November 07, 2008Reply With QuoteReport This Post
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quote:
Which begs the question, why are some weapons so sensitive and others not? What's the element that's out of tolerance on some, but not on others?


Drew816,
Good question and don't expect to get an answer from SIG CS. For FTF magazine issues, agree that mag spring tension is probably the issue and loading up the mag for about 2 weeks should work; also, load a mag with dummy ammo and cycle the action several times will help.

IMHO, in regard to suppressed or unsuppressed FTE issues, based on reading this forum and others, I think there is a manufacturing/assembly variability in the gas value block. Only solution for the MPX owner is to disassemble and thoroughly clean & inspect the value and Tappet per the tech manual. Make sure the value rotates freely in the gas block on reassembly. Depending on ammo, may have to clean & inspect more often.

Other than those suggestions, it is up to SIG to figure out and replace items that are "sensitive"; like SIG has done with the Gen 2 firing pin/bolt replacement.
 
Posts: 39 | Registered: August 23, 2013Reply With QuoteReport This Post
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Variation in the ammo is just as likely as variation in the MPX. Find ammo that your MPX runs flawlessly and stick with it.

Pretty much the same for every gun we own right??
 
Posts: 17 | Registered: November 21, 2008Reply With QuoteReport This Post
Thank you
Very little
Picture of HRK
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Received the magula loader this week, very well made and a significant advance in design over the other loader. Simple to use, you slide the loader on the mag until it clicks in place, then moving the lever back and forth for each load you drop in a round moving from right to left and rotate the lever back or forward to depress the round into the mag

It's simple, quick and easy, no loading five rounds into a slot then pushing in rounds

Both work, either are better than using your thumbs. The speed is probably the same as the magula is one round at a time, the other slams in 5 at a time, however you have the time spent putting rounds in the strip holder










"My rule of life prescribed as an absolutely sacred rite smoking cigars and also the drinking of alcohol before, after and if need be during all meals and in the intervals between them." Winston Churchill
 
Posts: 10846 | Location: Mouseville, FL | Registered: November 07, 2008Reply With QuoteReport This Post
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I am considering getting a hardcase for my mpx, was thinking of a pelican case, but than I found peak cases during a search..

http://www.peakcase.com/peakca...mpx-covert-case.html

has anyone used these?

about the same price as a pelican case, and the pre cut foam is an added bonus (tried cutting the foam for an AR on a another pelican case, and it ended up looking like a retarded monkey did it).
 
Posts: 149 | Registered: July 15, 2012Reply With QuoteReport This Post
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Picture of Gunner777
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I've always used Pelican cases. They hold up very well for air travel and general hard use.


http://gunner777.wordpress.com
Writer for "The Firearm Blog"

NRA Certified Police Firearms Instructor


Proud Father of an Army Airborne Trooper
 
Posts: 302 | Location: Missouri | Registered: October 31, 2008Reply With QuoteReport This Post
Network Janitor
Picture of mkueffer
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Finally took some time to remove the hinder and put the SRD can on the MPX. Now to decide if I want to cut the barrel down or look for an extended rail.





A few Sigs and some others
 
Posts: 1964 | Location: Waukesha, WI | Registered: February 04, 2012Reply With QuoteReport This Post
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Quick update:

Total round count is around 800rds, approximately half Magtech 115gr FMJ Brass case and half steel case Brown Bear 115gr FMJ. I've had about 30 or so failures, mostly short stroking (mostly with the brass case rounds, by the way!) and failure to go into battery because the mag springs are too stiff. I've left the mags loaded for 2 months and only one of 12 is still giving me fits. Also, my gun is a gen 2 and half my mags are gen 2 and half are gen 1. Both work fine! In fact, the one mag still giving me fits is a gen 2.

I'm starting to trust it more, but not completely yet. My Uzi Pro has fired more rounds and hiccuped ZERO times. It's currently in a defense role. With a little more testing, I hope to put this MPX into the rotation though!

Also one tip for cleaning, the internal receiver brush that comes with Tavor rifles (the cleaning kit is also for sale direct from IWI) works really well for cleaning out the inside of the upper. That is if you happen to also have a Tavor! I've been using the brush that came with mine on all kinds of other weapons, just an extra bonus to a bad ass bull pup!

This message has been edited. Last edited by: USMC1302Colt,
 
Posts: 7 | Registered: September 18, 2016Reply With QuoteReport This Post
Purveyor of Death
and Destruction
Picture of walker77
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I put a Franklin Armory trigger in my MPX SBR. It was a lot of fun, but only half the rounds hit the steel plate I was shooting at. I was surprised how uncontrollable that little 9mm is with (simulated) full auto.

I have a video shooting it with the trigger. But its really shaky. I was having a hard time holding the gun and the phone at the same time.
 
Posts: 6346 | Location: Raymore, Missouri | Registered: June 24, 2006Reply With QuoteReport This Post
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What size steel plate and at what distance? If you work on your technique I bet you will dramatically improve your hit rate.

Watch a few MP5 shooting technique videos. With my MP5, I can dump an entire 30 rd mag into a torso size steel plate at 25 yards FA.

Which version of franklin armory trigger? Did it drop straight in and just run?
 
Posts: 17 | Registered: November 21, 2008Reply With QuoteReport This Post
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quote:
Originally posted by Rangerone:
I received a response from the sales team of Geissele Automatics, and I was explicitly told that using their trigger in the MPX will void the warranty of the trigger.

So much for their golden warranty. I am very disappointed, though they have not tested it, and are aware of the forum talk about their triggers, they allow it to continue and it sells more of their triggers.

Legally, they have disclaimed by their note on their website, so let the buyer beware, use of their trigger voids warranty. Use at your own risk.


Thats disappointing as I bought a SD3G trigger specifically for my MPX.

I guess maybe their initial endorsement of their triggers in this weapon resulted in more failures and warranty work than they anticipated.
 
Posts: 149 | Registered: July 15, 2012Reply With QuoteReport This Post
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Added the 3 lug and fore grip to my factory K today. Now I need to find the perfect optic....



 
Posts: 17 | Registered: November 21, 2008Reply With QuoteReport This Post
Purveyor of Death
and Destruction
Picture of walker77
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quote:
Originally posted by obiefox:
What size steel plate and at what distance? If you work on your technique I bet you will dramatically improve your hit rate.

Watch a few MP5 shooting technique videos. With my MP5, I can dump an entire 30 rd mag into a torso size steel plate at 25 yards FA.

Which version of franklin armory trigger? Did it drop straight in and just run?


 
Posts: 6346 | Location: Raymore, Missouri | Registered: June 24, 2006Reply With QuoteReport This Post
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My BFS111 should be here today. Looking forward to shooting later this week.
 
Posts: 108 | Registered: January 01, 2016Reply With QuoteReport This Post
Middle children
of history
Picture of Brett B
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My MPX is getting closer to completion. I just installed the new 9mm Silencerco Trifecta flash hider that is compatible with the factory 13.5x1 LH muzzle threads:

https://www.store.silencerco.c...?variant=17796761476

I also installed the ASR mount and 9mm end cap on the Silencerco Hybrid which I finally got out of jail a few weeks ago.

In direct thread mode the Hybrid sounded great and had zero blowback, but it would keep loosening up due to the LH muzzle threads and RH can adaptor threads. I wanted to be able to fire the MPX without the can sometimes so this new ASR setup seemed like a great solution to both. Now I can torque the flash hider down with some Rocksett and still have a QD mount with a locking feature that won’t loosen while shooting.

So far it seems to fit great with just enough room to access the lock ring with the factory 8” barrel and factory rail. Everything locks up nice and solid, no wobbles anywhere. Now I just need my Form 1 to be approved so I can put a real stock on this thing!









I firmly believe that any man's finest hour, the greatest fulfillment of all that he holds dear, is that moment when he has worked his heart out in a good cause and lies exhausted on the field of battle - victorious.

-Vince Lombardi
 
Posts: 2160 | Location: Ohio | Registered: September 06, 2008Reply With QuoteReport This Post
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Nice Setup !

quote:
Originally posted by Brett B:
My MPX is getting closer to completion. I just installed the new 9mm Silencerco Trifecta flash hider that is compatible with the factory 13.5x1 LH muzzle threads:

https://www.store.silencerco.c...?variant=17796761476

I also installed the ASR mount and 9mm end cap on the Silencerco Hybrid which I finally got out of jail a few weeks ago.

In direct thread mode the Hybrid sounded great and had zero blowback, but it would keep loosening up due to the LH muzzle threads and RH can adaptor threads. I wanted to be able to fire the MPX without the can sometimes so this new ASR setup seemed like a great solution to both. Now I can torque the flash hider down with some Rocksett and still have a QD mount with a locking feature that won’t loosen while shooting.

So far it seems to fit great with just enough room to access the lock ring with the factory 8” barrel and factory rail. Everything locks up nice and solid, no wobbles anywhere. Now I just need my Form 1 to be approved so I can put a real stock on this thing!





 
Posts: 16 | Location: FL | Registered: June 28, 2012Reply With QuoteReport This Post
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