30RD AR-15 Magazine Spring, Extra Power 30 Round Magazine Spring Replacement:
- 30RD Extra Power Replacement Springs (100 pack)
- Increased pressure stabilizes the follower and improves feeding
- Works for USGI Mags, Magpul PMAG’s, ProMags, and similar variations of these.
- Change fully loaded magazines every 90 days by unloading and reloading a different fresh magazine.