Sig Sauer MCX/MPX Stock Adapter Features The Sig Sauer MCX/MPX Stock Adapter is a factory folding adapter engineered specifically for the MCX and MPX platforms attaching directly to the vertical Picatinny section on either firearm for a secure precise fit without modification or additional hardware. The 6-position mil-spec sized low-profile carbine-style receiver extension tube accepts a wide range of mil-spec carbine stocks for maximum versatility and aftermarket compatibility across virtually any AR-compatible stock on the market. The folding design allows the stock to fold for compact storage and transport maintaining the MCX and MPX s inherent portability advantage. The MCX/MPX coyote brown folding stock adapter is constructed from aluminum for a lightweight durable profile that adds minimal weight to the host firearm while providing a rigid reliable foundation for any attached stock. The coyote brown finish pairs naturally with FDE and coyote-colored accessories and furniture for a cohesive build aesthetic on compatible MCX and MPX configurations. Whether adding a stock to a pistol configuration or replacing an existing adapter this factory unit is the correct direct-fit solution for MCX and MPX owners. Sig Sauer MCX/MPX Stock Adapter Specifications Manufacturer: Sig Sauer Model: MCX/MPX Stock Adapter Color: Coyote Brown Material: Aluminum Style: Folding Tube: 6-Position Mil-Spec Low-Profile Carbine Compatible With: MCX / MPX Vertical Picatinny Section