Hello guys ! I am from Spain ( Madrid) , now as cold as it is i've decide to put down my mws just for winter . Meanwhile i can do some improvments , in fact i wanna raise his potencial to maximum , i am not so eager to spend lots of cash but since i have much love for gbb more than anything else i can make an exception. I am following this page from last year ago but i still haven't a clear idea what to do to my rifle . I wanna make a dmr gbb so the main idea should be a mk12a1 like external . I wan't some advices about what to buy , i have a local airsoft store that is like a rwa retailer .... Juddging from yours experience what to do : barrel lenght , type , hopup chamber , rubber , bolt , buffer , mags , gas !?