Round count unknown. Bought it used from a member here, was just going to be a truck gun so I didn't worry about round count. I'm pretty sure he said it was a Bushy. It has T2- T12 markings in between the slots on the upper, maybe someone here with a greater knowledge of AR uppers would know which maker that's indicative of.
It is an 11.5, my bad, I'll edit original post...
A3 style feed ramps.
If you need more detailed pics of something just let me know.