The MP BSL Arm Brace – HK94/MP5 is a durable, lightweight, collapsible arm brace designed to aid the single-handed employment of HK94/MP5-pattern pistols. Magpul MP BSL Arm Brace for HK94-MP5 Pistols (Photo courtesy of Magpul) June 03, 2021By Guns & Ammo Staff The MP BSL incorporate...