This weekend I had a chance to attend a class with Frank Proctor, www.wayofthegun.us I must say that Frank is the finest instructor I have ever had. He is also willing to travel around the country to any range that will host him. Enough said about Frank, this post is about my Rock River Arms Elite Operator 2. About 100 rounds into the class my bolt refused to go into battery and I was forced to switch guns. At lunch I had a chance to break down the Rock River to see what the problem was. Well, a tee tiny piece of the buffer tube had snapped off and allowed the buffer retaining pin and spring to move upward and freeze up the bolt carrier. Once I got the rifle home I disassembled the gun and filed just enough off the buffer tube so that I could screw it one more turn into the lower receiver. That made up for the small piece that snapped off. I called Rock River and asked them to send me the $4 worth of parts under warranty. They said no. They want me to pay to ship the rifle back so they can put $4 worth of parts in it. Rock River claims a lifetime warranty, but they aren't stepping up for a $4 fix. I could see their point if I was wanting a new chrome bolt, but $4 worth of small parts! Come on man!