Midwest Industries Gen 2 Top Heckler & Koch MP5 Rifle Rail Mount Black. This product is not compatible with any MP5 .22LR firearms. This rail is designed to fit 9mm receivers; there may be fitment issues with the 40cal/10mm receivers. Specifications for Midwest Industries Gen 2 Top Heckler & Koch MP5 Rifle Rail Mount: Manufacturer: Midwest Industries Color: Black Finish: Hard Coat Anodized Fabric/Material: 6061 Aluminum Gun Make: Heckler & Koch Gun Model: Heckler & Koch MP5 Gun Type: Pistol Attachment Type: M-LOK Gun Rail: Picatinny Caliber: 9mm Luger Features of Midwest Industries Gen 2 Top Heckler & Koch MP5 Rifle Rail Mount Gen 2 version includes a longer 1913 rail better clearance around the charging handle and lightning cuts for aesthetic upgrade Easy no gunsmith install all tools included Allows the user to mount an optic and a light or laser while retaining the factory handguard Forward M-LOK slot allows mounting of additional accessories Constructed of Hard Coat Anodized 6061 Aluminum for a lifetime of service 922R Compliant Lifetime Warranty Package Contents: Midwest Industries Gen 2 Top Heckler & Koch MP5 Rifle Rail Mount Tools Midwest Industries MI-MP5TR-G2: Gen 2 Top Heckler & Koch MP5 Rifle Rail Mount Black