Midwest Industries MIMP5OR HK MP5 and Clones Top Picatinny Rail Black Anodized 0 MOAEasy no gunsmith install, all tools included. Allows the user to mount an optic and a light or laser while retaining the factory handguard. Patent pending rock solid design. 100% Made in the U. S. A., 922R Compliant. This rail is designed to fit 9mm receivers, there may be fitment issues with the . 40 10mm receivers.