Convert your MCX/MPX pistol to a registered short-barreled rifle (SBR) with the SIG SAUER MCX/MPX Collapsible Stock. Adjustable to your liking, these Rifle Stocks by SIG SAUER offer three different lengths of pull so that it fits comfortably into your shoulder. The SIG SAUER MCX/MPX Collapsible Stock is also incredibly easy to install so there's no professional gunsmithing required. Having a collapsible stock makes stowing and transporting your MCX/MPX a breeze, and it's just as tacticool as it is useful in the field. Enhance your pistol with the SIG SAUER MCX/MPX Collapsible Stock to get a highly tactical SBR. Please note that many states local areas regulate the use and/or possession of collapsible and folding stocks. Know your state and local laws to ensure your use of this product is compliant with them. Specifications for SIG SAUER MCX/MPX Collapsible Stock: Manufacturer: SIG SAUER Gun Model: SIG Sauer MCX, SIG Sauer MPX Color: Black Condition: New Additional Features: Collapsible Interface: M1913 Picatinny Features of SIG SAUER MCX/MPX Compact Collapsible Stock, SD9-RSC-STKXCOLLAPSBLK: Sturdy collapsible stock. Adjustable length of pull. Easy to install. Package Contents: SIG SAUER MCX/MPX Collapsible Stock