The MK1 MOD2-M from PWS is a do it all piston driven AR-15 carbine. The MK1 MOD2-M is built with durability and reliability at the fore front. Starting from the inside out the rifle uses a Long stroke gas piston arrangement that is meant to give this rifle a better over all performance when compared to a traditional AR-15. The system is adjustable for gas output and is in the comfortable mid length gas system. The MK1 its self is made with high quality forged aluminum receiver that gives this rifle a wonderful level of strength to weight and rigidity. The lower receiver is also ambidextrous making it better for a larger variety of shooters. The free floating rail is light and adds a good amount of adaptability with its use of M-Lok and some Picatinny Rail. And for some other nice ergonomic touches this rifle comes with a nice stock and pistol grip and a ambidextrous charging handle that makes for easier for one handed operation. Get a rifle that is made for getting through the rigors of the field with the PWS MK1 MOD-2M.