I have recently been working on a few old classic CO2 pistols and rifles. Not knowing alot about them, I turned to Tim for rebuild kits and knowledge. Tim is a legend and rightfully so!! He was very generous with his knowledge and his parts are first class. I highly recommend Mac1 to anyone looking for help with some of the old classics and based on how well his custom guns perform, I would not hesitate on them or a professionally tuned gun!!