Pretty sure the CV47 isn't an actual weapon, but a way for Valve to use the AK47 (and several other weapons) without breaking any copyright problems. Glock18 is suposedly the glock in CS:S, but the Glock 18 is a full-auto weapon (and you sure won't find one for 400 bucks). Could be wrong here though....google searches for CV47 and CV-47 came up with nothing but an aircraft carrier, a european postcode, and CS:S.
I used to prefer the M4A1 in CS:S due to it's general ease of use, but I got bored with it and experimented with the AK/CV47, and have grown quite fond of it
