People usually don't recommend the 762x39 for the AR's, citing reliability & nastiness concerns. Does hers run pretty reliably; i really like that round & my friends keep wanting me to get an AR?
I've built three of them to include Glasses. The problem is with the hard primers on most 7.62 X 39 rounds and the AR hammer spring is too light for hard primers. I solved that by putting in a heavy duty Wolf hammer spring and have not had a problem since.
"I never killed anyone who didn't need killing."