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. 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. Fits MP5 & MP5A2.