Here's a problem... I got it home, and went to take it down. It comes with a hex key for removing the sight rail, and then says to turn the barrel screw 3.5 turns counterclockwise. The illustration shows a screwdriver being used, but it's a hex screw in there. Bigger than the supplied hex. SO I went into my tool chest and pulled out every hex key I had (standard and metric) and none fit.
***? To say that I'm frustrated would be an understatement. I'm going to ask at the range tomorrow, maybe its missing a hex key. But I figure they probably have the right size and then I can go buy one. near as I can tell, it's 3/32, but all my keys were 1/16 and 1/8.