Spyder AMG, Freak barrel kit, Bandit deron bolt, polished internals, turbo valve, madman spring kit, 68ci. 3000psi nitro Pure Energy tank
lighter, doesn't scratch,doesn't swell
none that I've noticed so far
I've been waiting to write on this bolt to see how well it would hold up. And its been great, still looks brand new. Like everyone else says, they stock one with show signs of scratching. I've put on average 1000-2000 paintballs a week though my gun with this bolt for over a year now, no big problems. The only thing I had a problem with was the set screw that holds the spring loaded ball in that in turn holds the cocking rod in backed out on me a couple of times and my knob fell off. I just simply took the screw, spring, ball, and knob out and just make sure to cock it before playing. Other than that, like I said its been great.
If you have an AMG this is really the only bolt avaliable but its also the best bolt I've used .