SIG SAUER MCX/MPX Folding Rifle Stock Coyote. Features a 6-position mil-spec sized low profile carbine-style receiver extension tube. Attaches to your MCX or MPX vertical Picatinny section. Specifications for SIG SAUER MCX/MPX Folding Rifle Stock: Manufacturer: SIG SAUER Gun Make: SIG Sauer Gun Model: SIG Sauer MCX SIG Sauer MPX Condition: New Package Contents: SIG SAUER MCX/MPX Folding Rifle Stock SIG SAUER Infinite Guarantee What firearm models does the manufacturer say SIG SAUER MCX/MPX Folding Rifle Stock is compatible with? The manufacturer says that SIG SAUER MCX/MPX Folding Rifle Stock is compatible with SIG Sauer MPX SIG Sauer MCX Sig Sauer MCX-SPEAR Sig Sauer MCX-SPEAR LTSIG SAUER 8901458: MCX/MPX Folding Rifle Stock Coyote