can i put it on uzi?
What adapter would be best for a Crosman 2240 with a long steel breech for use with this sight?
UTG makes an 11mm to weaver adaptor around 10 bucks.
My locking screw for sight adjustment isn't bored out to loosen/ tighten.Do you have to loosen the locking screw to adjst highth and windage?
Yes, you must loosen the locking screw to adjust the sight.
Will this fit a Picatinny rail or would I need to get an adapter?
Yes, this will fit a picatinny rail.
Will this fit on 3/8 dove tail mount
You might want to look at UTG 11mm (3/8") Dovetail to.... It clips into the Weaver mount and converts it to 11mm (3/8").
No, it only fits guns with weaver rails. You can purchase adapters to go from a dovetail to a weaver though. Enter this into the search bar: UTG 11mm-to-Weaver Adapter, Vertical Scope...