Will this work with a daisy red Ryder lever action BB guns?

You would need to purchase an aftermarket scope mount because there is no built-in mount on the Red Ryder. That said, unless you've seriously modified the spring in your BB gun, the effective range is such that you're not going to get much benefit.

with it work on my 22lr?

Yes, as long as your .22 has a receiver that's grooved for a scope.

Is the dovetail mount 3/8th or 11mm?

I am not sure what your are asking? The mount is adjustable using an allen wrench

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Description

🎯 Lock in your target, never miss the moment.

READY TO MOUNT GO - Includes 11mm dovetail mounts and scope caps for quick, secure setup.
CRYSTAL CLEAR VISION - Fully multi-coated optics deliver bright, sharp images for tactical precision.
VERSATILE TACTICAL EDGE - Designed for hunting, military, and target shooting—your all-in-one performance scope.
BUILT TO BRAVE THE ELEMENTS - Dry nitrogen filled and ruggedly water, fog, and shock resistant for all conditions.
PRECISION AT YOUR FINGERTIPS - 1/4 MOA click adjustments ensure pinpoint accuracy with every shot.

The Hatsan Optima 4x20mm Scope combines 4x magnification with fully multi-coated optics and 1/4 MOA click adjustments, housed in a durable, nitrogen-filled, water and shock-resistant metal body. Equipped with dovetail mounts and scope caps, it’s engineered for tactical, military, and hunting use, delivering reliable precision and clarity in any environment.

Specifications

Brand	HatsanUSA
Color	Black
Style	Scope
Product Dimensions	13.2"L x 1.5"W x 2.75"H
Sport	Hunting, Tactical & Military, Target Shooting
Material	Metal
Magnification Maximum	4 x
Objective Lens Diameter	20 Millimeters
Magnification Minimum	4 x
Compatible Devices	Rifle
Mounting Type	Dovetail Mount
Night vision	No
Field Of View	18.3 Feet
Model Name	Optima 4X20 Scope
Manufacturer	HatsanUSA
Reticle Type	Duplex
UPC	817461013476
Global Trade Identification Number	00817461013476
Item Package Dimensions L x W x H	12.01 x 2.09 x 1.46 inches
Package Weight	0.12 Kilograms
Item Dimensions LxWxH	12 x 2 x 2 inches
Brand Name	HatsanUSA
Warranty Description	90-Day Limited
Suggested Users	unisex-adult
Number of Items	1
Part Number	HA90499
Included Components	Instruction Manual, Scope, Scope Caps, Turret Covers
Size	One Size
Hand Orientation	Ambidextrous

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