Midwest Industries Inc made 13 M-Lok hand guard for Ruger 10/22 models. - Features - Lightweight design with a slim profile - True Free Float Design - Mounting bolt and wrench included - 13.0 overall length - 1.290 Inside Diameter - Two built in anti-rotation QD sockets - Features 8 sides of M-Lok slots - 5-slot polymer M-Lok rail included - Construction from 6061 Aluminum Type 3 Hard Coat Anodized for a lifetime of service - Fully dehorned for a non-abrasive comfortable feel - MI Lifetime Warranty - 100% Made in America - Keeps America Working - US Patent Pending