They're a mixture of Britannia, SHQ, Skytrex and Battlefield miniatures.
Below, I believe, is the battalion HQ.
Here is a .30" cal medium machinegun team.
And finally an 81mm mortar. These were held in store by the battalion to be doled out within the unit as required for an individual mission. I've proposed that we assume for our purposes that the Rangers have converted one "rifle" company to a heavy weapons role to operate the battalion's 60mm and 81mm mortars.