View Full Version : Sig Sauer MPX

01-11-2013, 12:33 PM

Just when I think I can’t be surprised, I get an e-mail about the new SIG SMG. The new SIG SMG is a submachine gun being introduced by SIG Sauer at the 2013 SHOT Show in Las Vegas.

The SIG rep I corresponded with advised the new SMG is very innovative, with an easy to learn system, great ergonomics and AR-15 style controls.

According to the photos I have seen, it looks like the SIG SMG has a folding, collapsible stock, a full length Picatinny rail for sights, a quad rail fore end, and an AR-style flash suppressor. The bolt release, pistol grip and selector switch all look very similar to AR controls.

The uppers will be changeable in a manner similar to the AR platform. This will allow the shooter to swap calibers and barrel lengths. Initially, the SIG SMG will be available in 9mm, .40 S&W and .357 SIG. According to SIG, the gas system is self regulating and can handle swaps between the above calibers without problems.

I am told there will be three versions of this gun (not including the different calibers.) A full-auto version will be available for military and law enforcement. Two semi-auto versions will also be made for civilian purchase: an SBR (short barrel rifle) and a 16″ carbine.

I expect that the gun’s barrel is threaded for the easy addition of the upcoming SIG suppressors.

I imagine this gun is a screamer with the .357 SIG rounds loaded. The bottlenecked SIG cartridge offers a significant step up in velocity when compared to the 9mm, and in an SMG, I believe this would be an awesome CQB round. Although not designed to do so, the .357 SIG would likely defeat soft body armor, while maintaining the gun size benefits associated with a pistol caliber SMG.

Many law enforcement agencies have been turning in the MP5 SMG and going with short barreled AR-style rifles. While the 5.56 offers some distinctive benefits for an entry team, a more compact SMG loaded with .357 SIG might be a good step up from the MP5 without running into some of the negatives associated with the very short barreled AR guns.

According to the company, the new SMG is still without a name. They could go with the SIG Sauer Ass-Kicker or the SIG Blaster, but I expect they will use some number for a model designation like “P226″, “P238″ or “Seven of Nine.”

Tip o’ the fedora to Tactical-Life.com for the photos. They have more, and you should immediately go check them out.

Read the original article here: http://www.gunsholstersandgear.com/2012/11/14/sig-smg/ . Make sure you visit GunsHolstersAndGear.com for all of the latest gun news, reviews and SHOT Show coverage.

SIG MPX is the official name of the new SIG Sauer submachine gun that has been rumored ahead of the 2013 SHOT Show. I have been in contact with sources at SIG Sauer, who have confirmed both the gun and the new name.

For those not familiar with the information on this new SMG, the SIG MPX will be a pistol-caliber sub-gun with controls very similar to those of an AR-15. The first run of guns will be chambered in 9mm, .40 S&W and .357 SIG.

A full auto version will be available, though restricted to government buyers in the United States. However, there will also be two civilian versions of the SIG MPX: a 16″ barrel carbine and a short barrel rifle (SBR) version with an unknown length barrel.

Pistol caliber SMGs have been popular with various military and law enforcement units, with the HK MP5 being the standard by which all other modern sub-guns are judged. However, I have seen a migration away from the MP5 to short barrel AR-15 carbines by many SWAT teams.

Only time will tell how popular the SIG MPX will be. However, I can see the .357 SIG version as fitting into a neat position between the MP5 and the AR-15. It would maintain many of the benefits of the MP5, such as size and less report than a SBR AR-15, yet provide more “stopping power” than a 9mm. Also, out of a longer (than a pistol) barrel, the .357 SIG cartridge is likely to defeat most soft body armor.

Read the original article here: http://www.gunsholstersandgear.com/2012/12/10/sig-mpx-official-name-for-the-new-smg/ . Make sure you visit GunsHolstersAndGear.com for all of the latest gun news, reviews and SHOT Show coverage.


01-11-2013, 12:56 PM
Beat me to it:)!

So whatdaya think? Prohib for looking like a bad guy's scary gun from action movies?
Sure looks sweet to shoot....

01-11-2013, 01:01 PM
If they sell a semi-auto version and don't mention it with MP5 and it might be allowed into Canada.

Granted at a price most won't be able to afford.

01-11-2013, 01:06 PM
Granted at a price most won't be able to afford.


08-25-2015, 03:55 PM
I'm resurrecting this thread because I'm starting to see guys in the USA reviewing these on YouTube. Just wondering if anyone has heard anything about the MPX making it to Canada.

08-26-2015, 12:00 AM
MD Charlton just posted this week that it's in the works (other forum), and the MCX is already approved. MPX looks like heaps of fun!

09-22-2015, 01:34 PM
I wouldn't hold my breath on getting an MPX anytime soon. All of the Sig literature I read shows they are mostly select fire, FA and SA, with one of the pistol versions being SA only. But there is an MCX review from Battle Beaver!


09-22-2015, 04:40 PM
I've already seen multiple YouTube vids of guys with semi-auto versions that are commercially available. It's basically an AR-15.

01-14-2016, 01:38 AM

I haven't took much noticed of this gun, but dang, sexy

01-14-2016, 07:45 PM
The rifle version of the Sig MPX reminds me of the Robinson Arms XCR, but apparently the MPX upper can fit onto an AR15 lower so I have no idea how well that would bode for non-restricted status, and now with the Liberals in charge it's pretty much a non-starter.