Shadow Systems MR920 Foundation Features The MR920 Foundation is engineered for precision and ease of handling. Its 4 threaded barrel with a 1-in-10 rate-of-twist is optimized for the 9mm caliber ensuring accurate and stable shots. The pistol s frame is constructed from durable polymer offering both strength and lightness. This model is equipped with white dot front and black rear fixed sights for quick target acquisition. The optics-ready Foundation slide allows for the attachment of a variety of optics. The flat-face polymer trigger provides a consistent and crisp shooting experience enhancing both control and comfort. The threaded barrel (1/2x28 thread pattern) offers options for muzzle device customization. Shadow Systems MR920 Foundation Specifications Brand: Shadow Systems Family: MR920 Pistol Series Model: MR920 Foundation Type: Semi-Auto Pistol Action: Striker Fired Caliber: 9mm Barrel Length: 4 Threaded Barrel Overall Length: 7.13 Magazine Capacity: 15 + 1 Number of Magazines: 2 (15 rd. each) Sights: FS: White Dot RS: Black Fixed Sights Barrel Finish: Black Nitride Frame Material: Polymer Safety Features: No Manual Safety Weight: 21.5 oz Additional Features: Optics Ready Foundation Slide Polymer Guide Rod/Optic Plate Flat Face Polymer Trigger Grip Material: Black Polymer