So I got my hands on the ICS MP5 A5/SD6 Like I was I hoping I would. So far so good. Battery space is limited, however, I love being able to swap upper receivers in a hearbeat. I highly suggest doing this, its like buying two guns. Seriously. I put a Systema tightbore barrel in so tomorrow, we’ll see how that works out in the SD6. It was shooting a bit hot. CPP clocked it @ 390 consistantly. I don’t know how much I would trust that. However, they clocked my Mk48 @330 with no issue. Sooo maybe they’re right. Gun shoots hard and fast, but it isn’t very accurate. I don’t want to fuck with the insides too badly because I bought it for CQB games. Not sure what project is coming up next because G2 M16A3 is out of stock….