NKD;n55504 said:
MichaelHK has some knowledge of these devices.
Only his has a cheap Ruger 10/22 barrel on it I think. Hahahahaha! (inside jokes)
Hahaha! It's still my favorite tactical single shot!
I had a love/hate relationship with my MPX while working the kinks out, but I couldn't blame SIG for it. After I got my form 1 back I ended up sending the upper off to Innovative Arms to have an integral conversion done. They ported the barrel with way too many holes and basically turned it into a single shot. I mean enough holes that the bolt wouldn't even move after firing it. They said that they never had that problem before. After sending it in I got a call from Phil (super nice guy) and when I asked if the barrel had too many ports he said that wasn't the problem (wtf?). They ended up building me a new barrel from a blank and porting that one (with less holes, even though that wasn't the problem *rolls eyes*), and after getting that one back it turned out that the chamber was too tight to feed any of the 37 different brands of factory 9mm that I had. Called innovative and they said it fed their ammo no problem at all. I asked if they could ream the barrel for me. They said to send it in and they would take a look. I got a call back after they received it and they said the chamber was fine and they would send it back. By this point I'm ready to throw the gun off a cliff. I get back the upper and factory ammo drops in just fine. They claim they didn't touch it so it must have been some magic voodoo going on while it sat in the UPS truck to and from.
So, my initial impressions of my MPX were that it was a 9mm AR that I now hated to death. Up until this point my CZ scorpion has been my go-to 9mm SBR. I shoot it suppressed 100% of the time, never clean it, can run any ammo through it with minimal blowback and it just chugs along. Fast forward to now when I have a functioning suppressed integral MPX and I'm very happy with it. Granted I wish that there was another port or two to keep 115gr subsonic (isn't that the whole point of an integral?), but it seems to sound pretty damn good with the 124gr federal suppressor ammo that cracks out of my other 9mm SBRs. I will say that unlike my Scorpion it will gas you to death with certain factory loads. With Slacker's reloads (thanks, Ryan) or certain factory subs it does fine, but with others it's almost unshootable. Given that mine has a Geissele SSA-E along with noticeably less recoil than my scorpion I will probably be using the MPX over the scorpion for future 2-gun matches. If you like AR controls, you will like the MPX.