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The author’s MPX SBR with Midwest Industries handguard, Eotech EXPS3 and GG&G back up iron sights.
U.S.A. -(AmmoLand.com)- I am an enormous fan of the SIG MPX; It’s the gun that brought me over to the dark side of converting a pistol into an SBR and donating $200 to the government. It all started back in June of 2014. I had a chance to visit the SIG academy for a media event where we got a chance to run new MPX select-fire SMGs.