USE A LASER SITE!

Using a correctly mounted laser greatly increases the accuracy and the safety of your Spud Gun.

A laser pointer works very well.
I used a plain keychain laser pointer. You can get them cheap. Here are a few laser suppliers I found.

When cementing your Spud Gun barrel on to try and get the red writing on top of the barrel. You can use the writing to line the laser beam straight.

Simply use rubber bands to mount it on the pipe!

Use the rubber band in the middle to activate the switch.

Use the red writing to calibrate. Very accurate! Look at Spudead1.avi to see how accurate!