No. In general, you pay the cost for grenades, additional ammunition, missiles, etc, and you have an infinite supply of the thngs.
Some items are for a single one, but those will explicitly tell you in the description.
thanks for celaring that up for me
Originally Posted by simonr1978
Re: Weapons in Close Combat
Additionally, as a failed Ammo roll represents not just running out of ammunition but also possibly the weapon's mechanism failing or circuitry burning out a failed Ammo roll for one type of ammunition still renders the weapon useless for the duration of the game regardless of if you have other ammunition available or not.