The Sig MPX…….nope, it’s the CZ-USA Scorpion EVO 3 S1. Simple but rugged Blow-Back bolt, mags drop free with ease, 30 round mags are $19.95, muzzle brake can be removed with your fingers, and it’s actually been released. Your move Sig Sauer! You have quite the competitor.
I’d take either one. Quality pieces, both.