When you rescue raiders they arrive with bandit weapons and limited ammo. There should be a way to manufacture more ammo for these lower tier weapons. Right now you can't manufacture more for them and in the early game you rarely can afford the time/resources to replace their weapons with PP versions
Manufacture Independent vehicles and weaponry, and equipment
Please allow for the manufacture of independent equipment.
In addition, why not complete it with a ground and air vehicle? A small, salvaged tank with a heavy, long range cannon would be good on the ground, and a small helicopter, good for three passengers would be perfect.