These are High Quality Airsoft Type Sights.
They have an Illuminated Red Dot with Continuously Adjustable Brightness Setting's from Dim to Very Bright.
They can be used on Airsoft Guns, Airguns
Paintball Guns, Cross Bows & most other guns. Good on Pistols.
Clear Sharp Reticules.
Ideal for 5-50yd Air Rifle Targets.
Or any Larger Targets at a Greater Range
Plus Gaming, Skirmishing re-enactments etc.
I think this is a Brilliant Sight I have one mounted permanently on my Daystate Harrier Bull-pup.
This is very easy to zero up.
Brilliant to use with both eyes open.
They use AG13 Batteries 2 of which are fitted.
Very solidly built from Polymer & Metal Alloy.
You may need the 11mm - 20mm Adapter Mount to fit this Scope to standard British 11mm Air Gun sight rails.
Parallax Free with Unlimited Eye Relief.
Anti-glare reflective coating on lens.
I No Sight.