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Signing UpStep 1Matierials
x1 81/2 inches of 1 1/2 in pvc pipe
x1 sheet of very fine black sandpaper
x1 5/8 large washer
x1 thing of plumbing insulation (for 1/2 in copper pipe)
x1 about 10 inches of 1/2in copper pipe
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Do NOT put this on a real rifle. Depending on the round, the FPS will be anywhere from 1600FPS to much, much higher, and will cause that device to explode, seriously injuring yourself, and your very expensive rifle.