I have a T/C Hawkens cap rifle in 54cal........It is a year or so old......My earth shattering question is what is the tiny headless screw which is located on the top of the barrel flat in front of the tang there for?.......Is this so you can screw in a threaded antenna to give your cell phone more range while you are out 'playing' mountain man????......I don't have this 'feature' on my T/C Hawkens fint 50 which I bought in 1978, of course they did't have cell phones back then tho.........john.........