Marble Gun

[mark.f]

Gun...

full.jpg (23.44 KiB) Viewed 1830 times

Piston...

piston.jpg (24.79 KiB) Viewed 1830 times

This is just the bastard child of an off-hand comment to my friend one day at school that I felt like building a marble rifle. After I got home, I was on a mission...

The barrel is 1/2" x 2' and the chamber is 3/4" PVC and elbows formed into a stock-type-shape-thingy. The valve is a small barrel sealer inside of a 1-1/4" tee, and the pilot and fill valve is a 1/4" ball valve with a male quick disconnect. Eventually, I might upgrade to a 1/4" Q.E.V. with a real-like blowgun trigger, but for now the ball valve works great. The piston itself is a D cell battery with some neoprene bolted onto the front and wrapped in duct tape. As always, I lubricated it with Hoppe's gun oil.

Right now, I can't really see where all my marbles are going. I CAN hear bushes and twigs snapping whenever I fire into the woods, though, so I can bet they're going pretty fast.

Might get a video up soon, it's too dark and I've got too much to do for now.

[experament_u2]

Iv always wanted to reply first to a post

Anyway i relly like the design good job nice and clean

[killagorrila99]

DAYUM MAN, Its sweet! If I were you id make the chamber larger than 20mm.

[mark.f]

Hey, it can all be rebuilt if I felt like it. Only cost about 15 bucks!!!

I was thinking about making the stock out of 1-1/4" or 1-1/2", but after piloting there is still enough air to make the marble go fast enough anyway.

[schmanman]

nice! did you use primer? or was it clear primer? also, isn't the piston a bit heavy? or did you empty it out? a lighter piston = better performance.

[mark.f]

Not always...

I did use clear primer. I've still got plenty...