Sig Sauer MCX/MPX PDW Grip, Black. This OEM factory original grip is crafted from high strength black polymer and crafted to fit the MCX/MPX pistol platform chambered in 9mm, .223 Rem, 5.56x45mm, and .300 Blackout. This quality Sig grip features detailed stifling and barricade indents for a smooth and firm point of contact during operation. This piece is perfect as an upgrade, replacement, or for the next workshop project.