Saw to cut pipe to length
Drill with 1/4", 3/4", and phillips head bits
4"PVC Pipe 26" long
Cap to fit 4"PVC pipe
1" PVC Pipe 16" long
2 3" bolts
2 washers to fit bolts
2 nuts to fit bolts
2 1" screws
Cut down your pipe to the proper length. You can cut yours a little longer or shorter depending on your height. However, remember that the shorter it is the easier it is going to be to push into the sand and back out again. The longer it is the easier it will be on your back. So you are trying to find a happy medium with the length. We found 26" to be a pretty good length for the kids and the adults.
Place your cap, open side down, on a sturdy workbench (preferably with a little more room than what we've got here) and center your 1" PVC pipe--future handles--over the cap. Have a friend prepare a strip of duct tape.
Change to your larger bit, 3/4" or whatever width you need to accomodate your bolt. Drill a hole through the handlebars and into the cap. Do this on each side of your duct tape.
Secure the cap onto the pipe with a screw on each side of the cap. DO NOT place these screws directly under the handlebars--your fingers may rub up against them when you are using the gun and this would not feel very good.
You are almost done now but first you need to measure where you would like your thumb hole to be. When using the gun you place your thumb over the hole when pulling the gun out of the sand. This creates a vacuum in the gun that pulls a tube full of sand and CLAM out of the beach. This gun is for our son Kirkham who has little hands and a short reach with his thumb.
Depending on the thickness of your pipe you may want to use your grinder to thin the edges of the bottom of the gun. This will help it cut into the sand a little easier.
You're done! Now go out to the beach and enjoy using your new clam gun! (but you must wait until clam season check this Washington State Fish and Wildlife page to find out when the next one is).
My clam series: Clamcakes, Cleaning Clams, Make your own Clam Gun, The family goes Clamming