I made a fire extinguisher mount using a Quick Fist Nozzle Clamp that utilizes the rail system in the bed. No holes or modifications to the truck itself, plus it can be moved to wherever it fits best on the rail system.
List of what I used:
1- Quick Fist Nozzle Clamp
1- 1/4" bolt
2- 1/4" draw bolt washers
1- 1/4" nut
1- spring
1- piece of steel with its width being slightly smaller than the opening of the rail system and its length being the same as the base of the quick fist
1- some kind of adhesive to glue the fist and steel together (this is not needed but it does make it easier deal with if they are attached)
Using the template provided, I used a 1/4" drill bit to drill a center hole in the steel and two partial holes that some nubs on the clamp fit in and keep the clamp from twisting. I then used some construction adhesive to glue the steel and clamp together.
I could not find any t-slot bolts locally so I came up with using the draw bolt nuts to hold it in the slot. The spring helps to keep tension on everything helping to keep everything where you want it, and makes it easier to turn the bolt so that it locks it in and then you can tighten the nut down. It also helps everything when you want to remove or slide it down, you just loosen the nut, twist the bolt, and remove. I may change this out for a good t-slot bolt if I find a good one locally.
Mounted:
Side view showing how the steel fits in the rail:
With fire extinguisher:
So far, it has very little movement, a little back and forth when hitting bumps, but no twisting at all. I made sure that I have the fire extinguisher low enough that it won't hit the shell window. The June Lake trip should make for a good testing period.