Alot, probably about £270 in the end, due to i forgot about the china to UK customs charge on anything over £130. Yes for the C02. Tbf ive bought the slide before the gun. Ive got a KWA mk23 but i want to sell it and put the monies towards the KSC C02 model. Only because in 2012 when i purchased the KWA i missed out on the RA tech steel slide. I'm only a collector, I don't play airsoft unfortunately.