Do not cycle well from magazines, cheap-limited life span

First, these do not cycle well from magazines in either pistols or rifles. They may even damage feed lips on mags. Therefore, these are worthless for a training aid. Second, they are brittle and have a limited life span. The only use for these would be for function testing since you can see a notch cut out in the cap after firing it so you can see if your firing pin is working.

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