Tactical Existence got their hands on one of the first MPX pistols, and almost immediately ran into a serious problem.

We had a chance to take the new Sig Sauer MPX out for a workout the other day, at first glance we were in love with the MPX. The pistol looks to be well made, with it’s all metal construction and buttery smooth action. What can we say this thing looks great! The Sig MPX comes in a very nice hard case with cut out foam that fits the gun and included accessories perfectly.The Sig handgun also comes with the new Sig SBX Brace on a folding adaptor that is already attached to the gun. The MPX also includes a sling, three 2″ aluminum rails and a full cleaning kit, very nice touches in our opinion.

We started with a fresh case of PMC 9mm brass ammo, and much to our surprise the gun almost immediately started to have serious malfunctions. At first we weren’t sure if the guns having some weird sort of bumpfire situation, or if it was something more serious like a double fire. After running a few quick test there was no doubt that the gun was in fact having a double fire malfunction. The weapon would fire with a pull of the trigger and then again on the reset of the trigger.

This is a big problem because as most of you already know if you are in possession of a firearm that fires more then one round with a single pull of the trigger it’s your fault no matter if it is or not, well in the eyes of the ATF anyway. After figuring out that we had an issue I took the lower receiver off the gun to inspect the trigger group. I found that the trigger group pins had walked out of the gun and was causing the hammer not to catch the disconnector. We then put the pin back in the gun and test fired to see if this fixed the problem, which it did for a second anyway. After about 20-25 rounds both trigger group pins were starting to walk out of the receiver again, at this point we stopped shooting the gun and called Sig for repair. We are sending the gun in now, and will let all of you know how it goes in an update video as soon as we get the gun back from service.