Gas tube

[GStephen]

Recently when working on my 308 that had the short gas tube I changed it to an armalite 12.0625”.   It’s all good now. I didn’t notice until later that the old gas tube was mangled a bit.  I am not very observant. 

 

[98Z5V]

Your gun didn't like the AR15 Midlength gas tube very much.  It's clearly seen that the gas key on the BCG struck that tube.

That's why the Height Over Bore thing that I bring up often, is actually important.

Here's a pic of what I'm talking about - click it, it gets bigger:

[GStephen]

19 hours ago, 98Z5V said:

Your gun didn't like the AR15 Midlength gas tube very much.  It's clearly seen that the gas key on the BCG struck that tube.

That's why the Height Over Bore thing that I bring up often, is actually important.

 

 

I didn’t think of that.  I thought it might have been hit by brass from one of the many jams from before I had changed the buffer and spring and got the longer tube.  It was definitely not reliable at all before.  Since all the changes, it has worked great.