So I've had this CVA .50 caliber Hawken pistol kit on my workbench partially finished for about a year. I got around to browning the barrel and polishing the brass a few weeks ago and decided to see how all the pieces fit together. The front sight slides in and out of the dovetail with no resistance and seems to be too small for the dovetail. Being a complete novice, I don't know if this is how it's supposed to be. I thought it should fit tight and need to be forced in, but it's loose. Any thoughts on proper installation?