Make the ear muffs a separate item. I'd like to be able to wear them with other headgear besides the high cut. Wearing them with a baseball cap and combat glasses would give a really nice 'operator' look.
Right now, the three-hole balaclava looks really goofy because it doesn't quite fit your character's head, so it makes your head look like it's shaped like a light bulb. Can you polish up the model so it fits your head better like the two-hole and one-hole?
Some headgear for insurgents that don't cover the eyes as much. Eyewear of any kind clips really badly with all the current headgear options.
Miscellaneous items, like wristwatches or maybe a charm attached to your gun (Within reason, of course).