I have a .50 cal. Investarm Hawken with the year code AN, I think it was made back in the 1980's if I remember right. I bought it used a couple of years ago, it had been shot but was like new. These guns are beautiful rifles! I have a T/C ladder tang sight that I was going to put on it but have not got around to. The downside is that Investarm recommends a max load of only 80 grains of powder with a conical or 90 with RB. That seems a little weak for what appears to be such a well made gun. I only use it on targets now and then so I guess it makes no difference.