i went with my girlfriend to a family function last weekend and to my surprise, her father had called me back into the family room. i walked in, and he was holding a sportered T-99 rifle. it wasnt too badly cut up (only the stock), and it was all matching but ground. it was a series 25 with a SN in the 3000 range. it had a long ladder rear sight, and front sight without guards. all in all, i think it could be easily restored, but i was just curious how hard are these ladder type rear sights on series 25 rifles? i know they ended very early in the 25th series, but i have never seen one for sale. anyone know?