I was just given six guns by my aunt one of which is a nice looking and feeling 12 gauge 2 3/4" only Model 1500 XTR. I looked up the gun in the blue book to find some info on it and it looks like they were only made for four years and there is not much info on the net about them. Are they just a different grade of 1400 ? how is parts interchangeability? are they ok shotguns or junk?