![]() ![]() In order to test its effectiveness, we loaded up a mag with whatever random 9mm rounds had accumulated on the editorial desk: 115-grain American Eagle FMJ, 147 grain +P hollow points, a few 9mm Major reloads from the race gun elsewhere in this issue…you get the picture. Or at least, it would be had SIG not incorporated a self-adjusting valve to keep operating pressures on an even keel. The MPX’s lies only about 0.125 inches out.īecause the bullet barely has time to leave the case before the gas system comes into play, it’s very sensitive to changes in ammo. How much closer? Well, an AR-15’s carbine length gas system uses a port situated about 6 inches ahead of the case mouth. To counter this, SIG moved the gas port closer to the chamber. Rifle rounds? No problem - there’s around 25 grains of powder in a 5.56 case to power the gun, but only 1/5th of that in a 9mm, which is compounded by much lower chamber pressure. The MPX differs from any other 9mm carbine currently on the market in that it’s gas-operated - a quick glance at a live round is all it takes to figure out why this might be a significant achievement, as there simply isn’t much in the way of powder (and therefore gas) to work with. We received one of the first pistol variants for T&E, but figuring that a lot of people are going to want to add a stock to this after getting their tax stamp, we also arranged for an SBR variant to make its way to into our grubby paws. It then languished in development purgatory for 18 months, while engineers split hairs, marketing staff teased us with videos, and the shooting public growled, “Release the damn guns, already.” As you delve deeper into this neat little gat, it’s obvious that a great deal of thought and work has gone into it - according to SIG, their staff burned through 11 million rounds in R&D last year, mainly on the MCX and MPX lines. When it was unveiled at SHOT Show 2013, the MPX was the gun everyone was talking about. With HK placing greater emphasis on their MP7 line and in-service MP5s racking up the miles, it made good business sense to offer an alternative for professional users looking to update their tools. It was against this background that SIG SAUER embarked on a program to develop the next-generation 9mm submachine gun, a position in western countries that’s been filled for the last 50 years by the Heckler & Koch MP5. Similar to American experience with the M4 and its 5.56mm round, they’re good enough for government work, and any improvements gained by adopting a new platform and caliber would outweigh the arse ache involved in the switch. They are reportedly very happy with them. The Swiss, legendary spreadsheet experts that they are, were the most recent country to do the math and settled on B&T’s MP9-N as the sidearm for troops who didn’t need a StG90. Then the micro-caliber personal defense weapon, or PDW seemed to have sunk the final nail in its coffin, filling its shoes when specialist troops such as vehicle crews whined that their carbines were too big to fit inside driver compartments.ĭespite the very real advantages offered by 4.6 and 5.7mm rounds, the logistics chain simply didn’t need yet another caliber to source, manage, and deliver to the point of use, especially when 9mm Luger was already in the system and would do the 80 percent of the job, 90 percent as well. First, the intermediate caliber assault rifle seemed destined to replace it in every possible role. At least Sig is coming out with different solutions.Like a character in a bad horror movie, the 9mm subgun seems destined to return time after time, despite every effort to declare it dead and buried. 357 Sig doesnt have enough ft/lbs at distance. I might just pick one up once available in 5.56 with the collapsible stock. With carbon forearm and a new short stroke gas piston system with a forward recoil spring, etc. With a collapsible stock or folding stock. Hopefully once they start mass production in 2014.Īnother option is the Sig MCX available in 5.56 or 7.62x39. It is also possible that it will come with lifetime warranty. Priced too high for basically a handgun caliber. And those pre-orders are in the 2k price range. In todays economy $2,000.00 is a stretch.Availability appears to be on 4-16-14 but in 9mm only. They will also need to lower the MSRP price quite a bit. 357 sig caliber also has a lot of flash and bark. I am interested in the MPX-C carbine 16 inch barrel in the SIG. Magazines will be pricey but maybe they will bundle them in three or five packs. As 9mm ammunition is not cost effective at this time. ![]() I am hoping you can just buy the gun in the caliber you request. They are initially going to be available in 9mm. The Sig Sauer MPX could be a true winner. ![]()
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