Silencer will reduce the chances of 1 hitting a enemy by at least 20%. The ASW however is has a perm Silencer which allows it to 1 hit 85-95% of the time. The Blaser is good since it has a fast scope and decent damage but its ability to 1 hit a person is really random with and with out the silencer. I would suggest the ASW over the Blaser if you want a silenced sniper.