MistWolf,

Thanks for your input. You're right in that I am inexperienced in interpreting the data. This is my first AR, and I'm new to the platform. From all I've found, the problem is in the Bolt Assembly. Not to be redundant, but the rifle functions fine with the Ruger bolt.

I could order parts and throw new ones in to experiment with,
but its not cost effective for me. For example, if I obtain a new complete bolt assembly for roughly 80.00 and it solves the problem, I still wont know which component failed or which combination of components failed. Yes I could get it back in operation much more quickly, but i'd be out 80.00 when its under warranty, and from what I understand, S&W frowns on modifications and non S&W parts.

I love the rifle and have no complaints at all with S&W. Stuff
happens and I get that. I just wanted to see if any other Sport
owners ran into this and what they did to correct it. In most cases the MP15 Sport 2 is a relatively trouble free platform.