welp brass or ammo not around here never reloaded for AR -15 before any suggestions powder primer got a couple thousand pieces 1x of fired brass
If you want to load for an autorifle, you'll probably need a small base sizing die, or you'll have problems with rounds not seating all the way into the chamber. Get that brass cleaned up, sized, trimmed, expanded, deburred,military primer-crimp removed, while you wait in components. Midway gets them, get on their waiting list.
