I've owned one Ruger tanger. An RSI in 308 with the full stock made in 1986. I took it to the range for the initial sight-in session and the trigger locked up and I couldn't get the first round off. Took it back to the previous owner and we did alot fiddling and adjusting and we thought we had it fixed. Went back to the range and I managed to get three rounds fired, and same thing. Trigger locked up. Called Ruger and they sent a replacement allen set screw for the front trigger adjustment screw, but we couldn't use it because of a small head on the screw and it wouldn't fit my gun. We also placed a WTB ad here on the fire for a replacement M77 tanger trigger. We found one and paid the shipping. I believe that was all that was requested. I installed the different trigger group and it functioned perfectly. And then a buddy came along looking for a good bolt gun in 308. He is now the proud owner, and I hope he doesn't experience anything like what I experienced.