It's the Classic Army Sport line version from what I've seen. So far their sport line versions are pretty solid, like the rentals at SOGO. They also just released their SCAR, so maybe you could get some info from somebody who has one. Overall I'd trust it enough to run stock for a while, see how it goes. The last Sport line I had was a P90 and it ran solid for years until something happened that was completely my fault. Good luck!