I am debating on which I would prefer.
The JP GMR-15 uses Glock mags, which I have, but would need to purchase some of the 30+ rounders. But they could be used in my G34 as well.
The Sig MPX uses their own mags, which I would have to buy at least one or 2 additional mags.
A new player has...
Limited Edition Sig MCX Pistol with the new and much improved Sig PDW Brace. This pistol is chambered in .300 Blackout is part of a special edition of 300 Snakebite Pistols.
9" Carbon Steel Barrel
Gas Piston Operating System
So last night after our classifier match was over, one of our shooters busted out his SIG MPX suppressed 9mm...oh sweet baby Jesus...He's trying to get me killed, the Minister of Finance would never approve that expenditure...but...... :)