Here are the weapon weights (actual values)
awp +m4+ak+all rifles 1.00
DE 1.2
Duiles 1.4
knife 2.00
nade 1.8 ->yes warm up counts!
other nades: 5.00 ->serious business
smgs 1.2-1.5
shotguns 1.1
scout 1.1
auto snipes .9