The B&T NAR Mounting Rail is a low-profile, military-grade scope mount that enables you to attach a scope or a red dot on to your HK rifle. Made of rugged, yet lightweight aluminum, the B&T NAR Mounting Rail fastens to the receiver via four screws. a Available for HK MP5 a Aluminum hardcoat anodized a 1.2" high a 1.6" wide The low profile B&T NAR Mounting Rail won't interfere with iron sight usage. Mfg: B&T Usa