I just tried mine out today. I think i have a new favorite gun. I haven't had that much fun is sooo long shooting. It ran pretty much flawless on federal bulk pack ammo. It is a spendy upper for a 22, but i honestly cant wait to take it out again. I shot 2.1k rounds today. It was so nice to be able to shoot the machine gun that much. Now i am really thinking about picking up a lackside machine RAZORBACK. but i have to make sure it can be set up for full auto. the LM7 for 1800 is ridicules. Any one have a LM7 or razorback, or ST-22 on an m-16. What are your impressions.