glock 31 chainfire (slam fire) solved.
Earlier I complained about my used glock 31 slamfiring with the lone wolf barrel in
.40 caliber. I sent the barrel into lone wolf and they sent it back a couple of weeks later. Before receiving it back, I took the glock into a local gunsmith, a registered glock dealer. He discovered someone had attempted a trigger job and replaced the transfer bar with an after market part to lighten the trigger pull, had put it back together and reversed a spring. The part had a bend in one end that was not as severe an angle as the factory part. It was a silver bar about 2 inches long and had several oval shaped holes milled out of it. The bar was removed and replaced with a factory glock part and the spring was put in the correct place. Shoots like a dream now and the lone wolf barrel that was for the model 35 is really accurate. I apologize to lone wolf if I in any way besmirched their reputation.