@lolpetewtf That looks like the Arizona Rocky Road ARIZONA ROCKY ROAD ANTENNA MOUNTS FOR JEEP WRANGLER, UNLIMITED AND LIBERTY
mount which I agree is the best one. It was a bit too tall for me and my garage. Mine is mounted at the base of my spare tire carrier (there is a picture of it on this thread Remove Sub Box to Ground and Run Antenna Coax - 2DR 2012
). My 3' FireStik FireFly hits my garage door by about an inch every day. It doesn't hit my hardtop on the swing back. If you mount yours on the back of the 3rd break light you might have clearance issues with the hard top wiper blade.
There are different types of FireStik. The one you want for a Jeep is the "FireFly" model. (The other models are like broomsticks).It will have FL in the product code. It is stiff and keeps straight at highway speed. It will bend 90 degrees under tension. It will not need a spring. They come in 3' and 4'. You will get more range from the 4', but 3' is good for trail use. After tuning with a SWR meter (or having someone do it at a truck stop) you will want to spray some hairspray in the cap to keep it from coming off when rubbing under something.