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This is a model of a paintball marker round used by paintball enthusiasts and was previously used for riot control where the paint was replaced with MACE. Its use in riot control was discontinued when a riot control officer shot an unarmed women in the eye with a MACE round, subsequently killing her (https://en.wikipedia.org/wiki/Death_of_Victoria_Snelgrove). This model is intended for display purposes only. I'd recommend 1-3 letters on the engraving.