Name: 11mm Dovetail to 20mm Picatinny 10 Slots Rail Brackets
SKU: MHJ-OPT-878

Description

11mm Dovetail to 20mm Picatinny Adapter — Bridge the Rail Gap

Many air rifles and rimfire rifles ship with 11mm dovetail rails — incompatible with the vast Picatinny accessory ecosystem. The 11mm Dovetail to 20mm Picatinny Adapter converts that narrow dovetail to a full 10-slot Picatinny rail in one step. Now your air rifle or .22 can use the same red dots, scope rings, and bipods as your AR-15.

Key Features

11mm-to-20mm Conversion: Mounts onto standard 11mm dovetail rails found on air rifles, .22 LR rifles, and European sporting rifles. The top surface is a full MIL-STD-1913 Picatinny rail — compatible with all Weaver and Picatinny accessories.
10-Slot Rail Length: Extended 10-slot length provides enough rail space for scope rings, red dot sights, or magnifier mounts with proper eye relief adjustment range.
Locking Grub Screws: Multiple hardened steel grub screws lock the adapter firmly onto the dovetail. The screws bite into the dovetail grooves, preventing the adapter from walking under recoil — even on spring-piston air rifles with bidirectional recoil.
Stop Pin Included: Removable recoil stop pin engages the dovetail’s factory stop hole (where present), providing additional recoil resistance for heavy optics.
Anodized Aluminum: Aircraft aluminum with matte black anodized finish — matches your rifle’s receiver and resists corrosion in the field.

Technical Specifications

Specification	Detail
Input Rail	11mm Dovetail
Output Rail	20mm Picatinny (MIL-STD-1913), 10-Slot
Material	Aircraft Aluminum, Matte Black Anodized
Locking	Hardened Steel Grub Screws + Stop Pin
Compatibility	Air Rifles, .22 LR, European Sporters