How - to website Instructables is running Launch It , a contest for people to send in their homemade invention . And here ’s one of the entries , a 25 mm pneumatic carom . Boasting a two - and - a - half - foot drum that is one in in diameter , the rifle has custom bolt - action chemical mechanism , a modded sprinkler valve as the principal sack valve , and a $ 40 sniper scope on the top . I fuck the fact that one moment the brains behind the weapon system is reminding us about safety goggles , the next he ’s telling us that PVC is undetectable by 10 - ray machine . [ Instructables ]
Instructables
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