First dont comment on things you dont know.
Second,do you even own gm4?
And last if you do own gm4,i wanna see you try and spar vs Retro with his m4a3;he will spam that thing like theres no tomorrow.
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Wow really,you dont say sherlock?
Isnt that obvious
We are not talking here about skills or m4 in particular,so yeah...anymore replies you might have "Talk to the hand"