This is a Chinese SKS. When fired, the trigger group will disconnect at the front of the trigger group and would fall out if not for the latch just aft of the trigger guard. It will fire 2 or 3, maybe 4 rounds before coming apart. I have duplicated this a few times but am leary about doing it any more. The pin that goes thru the trigger group looks fine. The notches were the pin seats inside the gun look fine. The gun cycles successfully when it stays together. I have a Yugo SKS and have dismantled it for comparison and there doesn’t seem to be anything different as far as the way the pins and notches look. I tried to swap trigger groups and even though they are both SKSs, they simply won’t swap and I don’t want to make a bubba modification. With the trigger group installed and positively latched in, there is no movement within the gun. I cannot force any movement by trying to manhandle it. I cannot imagine the gun having enough internal movement to unseat the trigger group when fired. That conjures up a disaster scenario. I've had the gun for 5 years but it first did this disembowelment two summers ago. Ideas? Suggestions?