Inspired by the iconic brugger and thomet stock for hk platforms, the sbt5ka enhances your mp5k with an integral, machined aluminum side-folding mechanism.It is constructed of 6061 t6 aluminum with a hardcoat anodized finish and has qd socket.It comes with an adjustable nylon strap.This model has a black finish.Finish: Black Hardcoat AnodizedType: BraceModel: HK BraceDimensions: 10.50" L x 1.25" WMaterial: 6061-T6 Aluminum