Strike Industries Modular Stock Alpha MKII Features The Strike Industries Modular Stock Alpha MKII is built from full aluminum construction giving the Sig Sauer P320 a rigid modular chassis that stands up to repeated use far better than many polymer alternatives. It includes both a Picatinny rail backstrap and a lite backstrap letting owners choose between added rail real estate for accessories or a lighter streamlined profile depending on the intended use. A spare magazine holder is built into the chassis keeping a reload close at hand without requiring a separate belt-mounted carrier. The ambidextrous extended charging handle improves manipulation speed and ease of use for both right and left-handed shooters running the platform. An included optic mount uses a multi optic pattern designed to fit most red dot sights currently on the market with all necessary mounting hardware provided in the package. This broad compatibility means shooters are not locked into a single optic brand when building out their P320 for red dot use. Modular extended mag release buttons are positioned on both the frame and the magazine holder giving the shooter multiple ergonomic options for fast reloads. Compatible with additional optional SMC accessories the Strike Industries Modular Stock Alpha MKII is a complete expandable chassis platform available for sale at GrabAGun. Strike Industries Modular Stock Alpha MKII Specifications Manufacturer: Strike Industries Model: Modular Stock Alpha MKII Caliber: 9mm / .357 Sig / .40 SW Compatible Hosts: Sig Sauer P320 Color: Black Material: Aluminum Handedness: Ambidextrous Available At: GrabAGun