Muhl at Airsoft Megastore does a comparison of two airsoft guns that you can use as your primary weapon for CQB games... "Everyone has a rhyme and reason selecting a system based on their mission role. In Close quarter combat, a compact system is needed is ideal but not limited too. We picked a Primary for this situation.(Gunbuilder GBBR PDW) You picked a Primary (ASG SCORPION EVO 3A1). Lets do a quick comparison of the two."