need help,,,,

hi guys,
ive got a king ratty 2250b im making a stock for,do i need to float the barrel,or does this not matter with air guns,and only affects rifles,thanx guy’s for any help you can give me,if so,and it does matter,im best checking my other guns,as we no it can affect accuracy,the only thing i no is the paper test,i no my 400s is ok,not so sure bout my older guns,just im hoping not to make hash of my new stock,so as you all say,ask questions first,then discuss them,,,,,,many thanx guys for any help at all,,,,,,,,,