I owned a closed bolt WE Scar L. It was awesome, more kick than other gbbr, the mags held enough gas for 3 mag fulls of bbs (so 90bbs total). It fired at 430 with .2g at least and was consistent, get .3g bbs for it. Or get the $60 or so fps adjustment. DONT GET THE CLOSED BOLT, it sucks at automatic, would crush the bbs and shoot them out like a shotgun, pretty cool but useless in medium range.
Any questions just ask (PM me), i researched this a lot prior and originally wanted the open bolt, but circumstances did not allow.