Shadow Systems SS-4306: The Foundation Series built on the same frames as all Shadow Systems pistols touts sleek ergonomics, real-world shootability and reliability. Features wrap around texture with interchangeable backstraps; slide with pocket cut serrations; optic cut, allowing for direct mount of most major optic brands; steel sights with black serrated rear and white dot front; affords lower 1/3 co-witness with most optics; rifled, match grade nitride barrel for +P ammo; carbon steel guide rod and a drop-safe, polymer trigger. Fits Glock 43X MOS/48 MOS holsters. Includes two Magpul magazines and three interchangeable backstraps.