Since there are already multiple mole traps that are body gripping in nature, the first question should be if there a market for something like this. Next, think of how a body gripping trap works. You have a set position and a fire position. The jaws move from the set position to the fired position by a spring. A good way to think about this would be to visualize a 110 in a muskrat tunnel. Things you'd need to think about include how big the tunnel is, how big the animal is, how much travel would be required by the spring and any obstructions that would interfere with the jaws closing and/or the spring expanding to its maximum size.

Having said all that, I'm going to go back to my first point with is there a market. If you would make one that has a center trigger, would be compact like 1 1/2" high by 3 or 4 inches long and have the spring in such a manner that it was not hindered by the ground and had the strength to hold a mole once triggered, I'd think there would be a market worth exploring.

I have seen the round body grips the were 3.5 in. They should work for a mole if something did not keep them from going off.

I have seen the round body grips the were 3.5 in. They should work for a mole if something did not keep them from going off.