The SBT5K enhances your MP5K with an integral side-folding molded polymer end cap. - FITS: 2 PIN K MODELS SUCH AS HK SP89 HK SP5K PTR 9KT CENTURY ARMS AP5-P & AP5-M MOST SP5K CLONES (9MM ONLY). - Features - Complete assembly ready-to-install - Molded polymer end cap with QD socket - Integral side-folding mechanism - Comes with adjustable nylon strap for custom fit - US veteran designed and proudly made in the USA - Product Includes: - Complete assembly - Adjustable nylon strap - SBT5K Specifications - fit: HK MP5K/SP89 Clones SP5K - width [max]: 2.25 - length: 10.5 - strap width: 1.0 - weight: 12.5oz - color: Black