Features: Easy 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 Weight 3.3oz. Overall Length 4 3/8" Constructed of 6061 aluminum, hard coat anodized for a lifetime of service 100% Made in the U.S.A., 922R Compliant MI Lifetime Warranty This rail is designed to fit 9mm receivers, there may be fitment issues with the 40cal/10mm receivers.