Currently the CRL says H harness so i dont think the Y harness would work, but the Extra pouches i think would be ok. currently the CRL for the Army Trooper states " Any additional OD Green MOLLE style pouches are encouraged to fill out the belt, but are not required." I personally grabbed a couple grenade pouches and a single Mag pouch to add to my costume. I was thinking a couple thermal detonators would be a nice touch.