The MPX Copperhead features a monolithic Elite Series Cerakote finish upper receiver"" with an integrated stock knuckle lower"" and a 3.5"" barrel with integrated muzzle brake. Unconventional design"" unmatched performance"" and familiar AR handling. The SIG MPX redefines the submachine gun category with a new level of operator safety"" in-field adaptability and proven reliability in the harshest environments. Completely ambidextrous"" the SIG MPX is great for left- or right-handed shooters with its dual-sided selector switch"" magazine release"" charging handle and bolt release.