I actually have that same gun. Got it from Bud's about a month ago. Only shot 30 rds through it. This was my first AR and seems to put together well. The gas key is properly staked as is the receiver castle nut. However, after disassembly & research, it does not have M4 feed ramps nor is the barrel chrome lined (which could be a positive depending on how the gun is used).
I still think it was a great deal bc I saw the same model going at the Gonzales gun show last month for $865.
If anybody wants more pics of the gun, let me know and I'll post them up.