Sons of Liberty Gun Works East India Upper Receiver Owner Induced Feeding Problem with Live Fire Testing.

EDITED TO ADD FOLLOW UP RESPONSE FROM THE OWNER:
Alright gents,

To ease any qualms, the issue was user error installing the rail. The reaction rod I used wasn’t stellar and is getting trashed.

The reaction rod used is called the “Real Avid lug lock”. It was recommended to me by a friend, but it didn’t perform as it should.