I have 3 USGI 30-rd mags for sale. They are all a tight fit in my rifles, but I had no malfunctions with them. 2 Center brand, 1 Parsons, and all have the older black followers. Pics:
All 3 for $27, shipping included, to the Continental 48 states. I will ship USPS.
Prefer postal money order, but will take a personal check or non-postal money order (will be held at least a week to ensure it clears okay).