So last Sunday I was taking a class with my friend. It was a fairly basic class, but my friend hasn't really shot much rifle (shoots a lot of shotgun) so I thought it would be a good class for him. That day I was running my SR-15 Mod 2 14.5" with a pinned MAMS
It has some decent mileage in it, probably around the 8-9k range. I cleaned it around the 7k mark because I was shooting in the pouring rain and there was this super sticky clay mud getting everywhere. It started to slow a bit, but other than that not one failure. Anyways, I noticed on one of the reloading drills, it wasn't locking back. I thought that was odd, since I've ran it much much longer without cleaning. Slowly it became much much worse and it began short stroking. Then it turned into a single shot. I began to scratch my head, and at the next break swapped to one of spares.
When I got home I pulled the bolt back and then I could heard a rattle. I looked inside and noticed the gas tube was sitting much deeper inside the upper than usual. It ends up the nut that holds the gas tube to the gas block came off.
The gas tube sitting normal:
The gas tube sitting too deep when I held it muzzle up:
The rattle was the gas tube and the nut that holds it sliding around:
You can see how the gas tube slid off the end and is now off the gas block
Definitely glad I had those grip panels on. Otherwise my hand would have got a nice shot of gas:
Have you guys ever seen this before? I have no idea where to even begin. I assume I need to take the rail off, but then how do i get the gas block to move forward so I can reseat the gas tube and tighten down the nut?