.... 400 FPS for CQB????.... I wouldn't be playing there if I were you.
Shemagh/Keffiyah around your neck should protect your neck. If the field allows get a Sykes mask, nice low profile full face protection. There's also the "save phace" masks that I've seen and they seem to be really nice low profile too (low profile = you can use your sights).
As for back... I dunno I guess like a brace or something might help to relieve stress if you're doing "tacticool" rolls.
Kneepads.... Yeah I guess if you're doing CQB. Nothing worse than a BB in the knee if you crouch in the wrong place in an indoor field.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE