The SB Tactical SBT5K Pistol Stabilizing Brace is designed to enhance stability and control for B&T APC and HK UMP pistols. This brace features an integral, side-folding mechanism, allowing for compact storage and improved maneuverability.Note: Due to varying tolerances between roller lock manufacturers, gunsmith installation / fitting may be required.Features: Fits HK MP5K/SP89 clones and SP5K Side-folding design Includes adjustable nylon strap Molded polymer end cap with QD socket Made in the USA The SB Tactical SBT Pistol Stabilizing Brace is a top choice for those seeking to improve their pistol handling experience with a reliable and user-friendly stabilizing brace. It comes ready to install with a complete assembly and adjustable nylon strap.