Airsoft Master features the G&G CM16 Raider 2.0 AEG that comes with the M-Lok Rail System and is available at their online store... "The G&G Combat Machine CM16 Raider 2.0 Airsoft Gun is built with nylon reinforced polymer for durability and has a more modern design. It features an 8in. M-Lok rail system, flip up front and rear sights, ambidextrous magazine release, rotary hopup, full metal gearbox and more."