Quote from nastycobra on 07/30/10 at 16:56:36: I have AR15 and I know the USGI mags are prone to the lips bending under the spring pressure loaded so I dont keep them loaded at the house.
Really?
Then you think I should unload my GI issue M16 mags that have been kept loaded since I "acquired" them from Uncle Sam in 1970? I do down-load by two rounds, but still, no cracked feed lips in 40 years so far.
It might be of interest to know that Gene Stoner designed the aluminum M16 mag for one time use.
They were to be loaded at the factory, packed, and stored or shipped to the battlefield loaded. It didn't turn out to work that way, as the military quickly decided they didn't want to buy new mags every time they were used once.
But still, it won't hurt them to leave them loaded for long periods of time as designed.
rc