7 62 X 39 SBR - Working out the Bugs

A follow-up video about the upper and parts that I won from El Tenda's channel giveaway. The Rise Armament trigger was malfunctioning and I was getting light primer strikes and non-firing rounds with the Kaw Valley trigger and the other lighter trigger springs that I had. Additionally, the hollow point rounds were intermittently hanging up on the feed ramps. I solved all the problems by using a mil-spec lower and running FMJ rounds. After this, both mags ran 100% and the upper was spitting fire.
Thanks again to El Tenda's channel and Koyote Tan for the parts.