As the title says, I recently bought a stripped Omni Lower. Inside the box it came with a piece of paper that stated to not to use a commercial buffer tube, stock, buffer or spring and only use a MIL SPEC buffer tube, buffer, spring, and stock.. My question is why? What does it matter with these polymer lowers? I have assembled it completely and even test fitted a commercial stock setup i had laying around and noticed no issues with fitment on the lower with the commercial tube and parts.
thanks in advance for your replies.