Stuck CO2 cartridge puller

[RexB]

I have a commercial trap I bought for my son and his friend mentioned in another post, but I like your design and will probably modify mine with some of your ideas. The basement has a collection of old Popular Mechanics, Pop Science, electronics and woodworking magazines that I plan to stack around the trap - not sure I'll be a very good shot to start with, nor sure of how accurate the old CO2 pistol is.