I think we should be able to have two of the same perks. heres a example: if i had a auto rifle, i have grenadier covering 2 perk slots. usually grenadier only gives you 10% grenade energy per kill, but because i have 2 grenadier perks, it gives me 20% grenade energy. the tradeoff is that you are sacrificing a 2nd perk to make 1 perk stronger. i think stackable perks would be cool, but only certain perks could be stackable bc some perks can be broken like double hidden hand (that would be +30 aim assist!)tell me what perks shouldnt be stackable.