No wooden bullets ever. No Glasers since waaayyy back when they were "Sky Marshals" carrying Charter Arms Bulldogs. Gold Dots these days.
As far as issued vs "other" weapons, they don't have the luxury of using they're own personal guns, picking up guns off the ground, getting them from their friends, or purchasing them from the local black market. Like every other federal agency they take what they're given, like it or not. That includes guns, ammo, magazines, holsters, cuffs, etc, etc. The only place they may have options would be holsters depending on mode of dress but the holsters would still need to meet retention requirements and perhaps accessability policy.