Red Dot on a Spring Air Gun?

[Archie Klein]

I'm looking for a red dot sight, under $150, that will mount and survive on my Hatsan Mod 25 0.177 break-barrel springer air pistol.  My use is pest control at 50 feet max.

I really want one that is designed for an 11mm (not 3/8") dovetail rail.  But I will use a 11mm to 20mm Picatinny adapter if there is no other choice. 

TL;DR:  I've tried six red dots so far (below).  All have failed mechanically within a couple hundred shots; often less.

Has anyone had long-term success with a sub-$150 red dot on a springer?  If so, what gear?

Thanks


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Hatsan Optima 1x30:  This mounted fine and had acceptable parallax but the dot adjustment turret failed internally and began to spin uselessly.  I later read it may be small screws coming loose inside.  Two of these Optima red dots very quickly failed in the same way.

Hawke Vantage 1x25:  This mounted fine and had low parallax but after only around 60 pellets the dot adjustment turret failed internally and the dot would not turn off.  I later read that this is due to copper bridging on the pc board that  many cheap red dots use as a switch element in these turrets.  Though this one wasn't real cheap and I expected far better.

Ballista 1x30 Red Green:  This mounted fine and parallax was acceptable but the windage knob failed internally and became loose.  Felt like it would come off in my hand if I kept using it.

EZShoot 1x30 Red Green:  This mounted fine but had noticeable vertical parallax out of the box.  At first this was only in the top of the field of view but it soon affected the whole field ie. vertical red dot action was non-existent.

BSA RD30 1x30:  Mounting failed because it's really designed for a 3/8" dovetail and required significant screw force to get it onto the 11mm rail.  Where it might have been ok for a powder gun or PCP but it needed even more screw force to have it hold against this springer recoil.  The screws have square shanks to prevent them turning when the nuts are tightened.  With the force needed these square corners rounded off.  Might have been salvageable by replacing with quality machine screws, lockwashers and nuts but the sight also had noticeable horizontal parallax at 40' so I gave up.

This BSA experience is why I don't want a red dot designed for a 3/8" dovetail but which "ought to work" on 11mm.