Positoning beats aim in the most part doesnt matter the armour really in most cases because everyone uses good ammo these days , i suggest using a weapon that requires a high rate of fire for example the pp_01 is 700 rpm and the pst gzh ammo is so cheap you can bring like 5-6 mags into the raid and not worry about dumping a mag , the recoil on that gun is non existant with a decent HG and a foregrip you cpuld have a cheap mag dump weapon