Sorry this thread is old I have a MBR556 dmr and it's awesome
Easy around 100m range with .36s
People always think am cheating as they think there hitting me as I can hit them thinking it's a normal MBR but when I say whats been done an give them a shot there like woaw, it's got, gate titan,changed the bucking (can't remember which one, CNC gears and been short stroked, guarder spring, piston was machined slightly bigger(inside diameter) and better seals, with modifications to cylinder head and piston head(machine work was done by a friend of mine who knows his way round CNC machining and is an awesome Airsoft tech) locked to single shot through the MOSFET can switch to full auto although illegal. Shoots 430fps so right on the limit at most sites my way for dmrs. Also have a Tokyo mauri mk46 mod0 now that is a weapon use tht mostly now but when I tire carrying tht beast I switch back to the dmr as you can still be involved in the action better than a bolt gun I think. Albeit abit further back.