LWRC IC DI M-Lok 5.56mm NATO 16.1in Black Semi Automatic Modern Sporting Rifle - 10+1 Rounds - California Compliant - The LWRCI Di is made with the same craftsmanship and design excellence that comes with every LWRCI firearm and now available with LWRCI specified M-LOK Rail. Built from the ground up to be more than just another direct impingement rifle, the LWRCI Di delivers the quality every rifle enthusiast demands with innovation that's expected from LWRCI. High Performance features like fully ambidextrous controls, monoforged upper receiver with modular M-LOK one-piece free float rail, LWRCI Cold Hammer Forged Nicor-treated spiral fluted barrel. (NOTE: Spiral Fluted Barrels only on 16.1in barrel lengths) Our innovative "keyless" bolt carrier design, combined with an operating system that is time-tested, makes the DI the perfect addition to the LWRCI lineup and your gun cabinet. And, since the full ambidextrous lower receiver is compatible with the rest of our IC family, you can upgrade your Di to our flagship, piston-driven IC just by switching out the upper. Step Up to High Performance- Step Up to LWRCI- DI! Threaded Barrel: (1/2 x 28); 1:7in Twist ; Direct Impingement System; Proprietary DI Bolt Carrier; M-Lok Free Float Rail; Ambidextrous Controls; Enhanced Fire Control Group; A2 Birdcage Flash Hider; Ambidextrous Charging Handle; Adjustable Compact Stock;