Its the K8 model target match. I have decided to do the trade rifle for rifle instead of uppers. Its a sweet rifle and I have seen way to many .25" groups from these guns to pass it up. The spikes is just an AR just like every other production AR, IMHO. I have owned two colts, one RRA elite operator, one RRA LAR15, and one custom built M4. THey have all functioned and shot the exact same. All were 100% reliable. The only rifle I have any opinion about is a bushmaster varminter. And my opinion of that rifle is not favorable. I'm pulling the trigger!