So you dropped your brand new HK MP7 Navy GBB magazine on the cement while trying to impress your buddies with a speed reload demo. You cracked the base plate and the gas infill valve is now leaking out all of the Elite Force green gas that was once in your beloved magazine. Now what? Don't retire the magazine - rebuild it! Our HK MP7 Navy GBB Mag Rebuild Kit has everything you need to restore your MP7 mags to pristine working order. These kits are a must have for any GBB user. Add one to your tool kit and be fortunate when the unfortunate occurs!