I dont know why so many people use bling, my favorite perk 1 is def scavenger. The normal version allows you to pick up mags off of dead peoples bodies, and the pro is basically bandolier + picking up mags. I never run out of ammo. Bling should never be used with a red dot because you could just use the iron sights instead and save a perk. Only time its good is silencer + heartbeat sensor which is rape.