I have own one and have shot it extensively in competition since 1991. I have experienced the same problems reported above with regards to availability of parts, or lack thereof. It also shows its age and is quite a bit heavier than most competition hanguns on the market today. I now shoot a Hammerli Sp20, but still use my Tri-ace for .22 trg. One of teh thing I liked the most with teh Tri-Ace is that it doesn't have any counter-weight adjustments on it, so its that much less things to worry about.