I went to the range yesterday and try out my two new builds. I load one round in the first rifle and fire. The action did not cycle. I load one more round, same result. I put the rifle away thinking I missed something when assembling. Later after getting the kids to bed I go and take a look.
There was no sign of any gas getting to the BGC at all.
I know I’m being vague here but can anyone guess what I found?

