I currently use a CYMA mp5k for CQB games and I'm looking for a good field gun. I really like the mp5 platform and I'm thinking an SD6 will be perfect. The only problem is that it seems like every sd6 on the market is blow-back (blech!). I've held the new ICS MX5 and the fore grip feels like holding a cheese grater. Any suggestions? My budget is $300 and ideal fps would be around 360 to 400. I also prefer full metal.