If you want em as a start troop you have to edit them, and I donÂ't think you have any idea of how to do that. If you do, ask in addons forum.
Otherwise, take a regular guy and write in the init field:
removallweapons this; this addmagazine "NameOfMagazine"; this addweapon "NameOfWeapon"
Copy + paste the addmagazine command so many times you want the guy to have that much magazines.
Remember to addmagazine the guy before addweapon him.