Rock Island Armory TM22 Semi-Auto Rimfire Rifle - .22 LR - 18" The innovative Rock Island Armory(R) TM22 Semi-Auto Rimfire Rifle combines familiar AR operation and parts compatibility with the cheap-to-shoot .22 LR chambering to create a rifle that's accurate, customizable, and a ton of fun to shoot. Forget plastic - the TM22 is made from 7075 aluminum front to back. Plus, it's compatible with AR-style grips, commercial buffer tube adapters, and forends. Built for all ages and all scenarios, the TM22 features a topside Picatinny optics rail and M-LOK(R) forend for attaching accessories. Minimalist stock. Includes two 10-round magazines. Combines AR-style operation with .22 LR chambering Compatible with AR-style grips, commercial buffer tube adapters, and forends Made entirely of 7075 aluminum M-LOK forend Minimalist stock Includes two 10-round magazines