and yes a radio.
you dont need a helmet, ive never used one in 6yrs just extra crap to cary, if yer accident prone ie trip n fall often maybe youd want one, matchin camo is good but you dont always need it for milsims depending on the rules for the game, they may need "contractors" or "terrorists" im actually gonna build a terrorist loadout especially now that i found Salwar Kameez in woodland camo