My Colt L. Commander XSE came with a full length guide rod and I bought a Harrt's Recoil Reducing guide rod. I don't push in the plunger to take down the gun. I just pull the pin and remove the slide. It has always seemed much easier to me on all 1911's to do it like that. I had no idea some guide rods need a pin in them to be removed. Odd. What does this design offer???