I knew something had to be done to reinforce the buffer tower. After much time looking at the lower trying to see where I could add more plastic, I struck upon the idea of the support rib. This feature is the key to all of the Hoffman Tactical lower designs. V2.2 fired over 60 rounds without buffer tower failure. It did fail, but as a result of poor handling during take down. The front take down pin lugs cracked.
