The Midwest Industies Low Profile Picatinny Top Rail for the HK MP5 gives you optic mounting on one of your favorite classic guns. This picatinny rail allows you to mount, red dots, to scopes, or even a light or laser. The rock solid design only weighs in at 3.3 ounces. Features:Easy, no gunsmith install, all tools includedAllows the user to mount an optic and light or laser while retaining the factory handguardRock solid designWeight: 3.3ozConstructed of 6061 aluminum, hard coat anodized for a lifetime of serviceNote: This rail is designed to fit 9mm receivers, there may be fitment issues with 40 cal/10mm receivers