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