Retains the advantages of handgun classification and provides a third point of contact – adding greater stability, accuracy and control. (Know the applicable laws in your jurisdiction.) Velcro strap attaches to forearm for more solid control. Integral, side-folding mechanism. Complete assembly and easy to install. Solid fit. Veteran designed. Developed in conjunction with B&T USA. Design based on the iconic B&T stock for HK platforms. Fits HK MP5K/SP89 Clones, SP5K. WILL NOT fit HK MP5, MP5K Reverse Stretch, or HK53 Clones. Weight 12.4 oz. Length 10.2 in. Strap width 1 in. Maximum width 1.25 inches.