How To: Make a semi-automatic pen gun

Make a semi-automatic pen gun

How to Make a semi-automatic pen gun

Making small, nonlethal firearms out of desktop materials is one of the most fun things a student can do in a boring class, and there are a millions ways to do it. This video will teach you how to make an awesome semi-automatic pen gun that will annoy your friends much faster than the single-shot models seen elsewhere.

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