Dovetail to Picatinny Adapter: 11mm to 20mm Fit and Install FAQ

Adapter direction and fit questions

Which adapter converts an 11mm dovetail rail to a 20mm Picatinny rail?

Use the 11mm 3/8" Dovetail To 7/8" 20mm Picatinny Rail Adapter Converter. It fits an 11mm dovetail rail and provides a Picatinny top surface for mounting Picatinny or Weaver standard scopes and red dots. It is available in 9 slot, 14 slot, and 24 slot sizes.

Which adapter goes the other way, from Picatinny to 11mm dovetail?

The 20mm Picatinny to 11mm Dovetail Convert Mount has a 20mm Picatinny base and an 11mm dovetail rail on top. It is designed for mounting an 11mm fitting scope or sight onto a Picatinny rail. It comes in 1.18", 2.36", 7", and 10" lengths.

Will these adapters fit my specific rifle or scope?

The product information confirms only the rail interfaces: 11mm dovetail and 20mm Picatinny. It does not list firearm models, ring spacing, or screw thread sizes. Measure your existing rail and check your scope ring or mount interface before ordering. If your rail is not a true 11mm dovetail or a standard Picatinny, these adapters may not fit.

Product facts for the 11mm to 20mm converter

• 11mm 3/8" Dovetail To 7/8" 20mm Picatinny Rail Adapter Converter: Fits dovetail 11mm rail and converts 11mm to 20mm. Confirms the base and top rail sizes so you can match the adapter to your existing dovetail rail and Picatinny accessories.

  

• 11mm 3/8" Dovetail To 7/8" 20mm Picatinny Rail Adapter Converter: Picatinny rail allows for the mounting of Picatinny or Weaver standard scopes, red dots. Tells you what the top rail accepts, so you can plan your optic choice.
• 11mm 3/8" Dovetail To 7/8" 20mm Picatinny Rail Adapter Converter: Available in 9 slot, 14 slot, and 24 slot sizes. Slot count affects how much rail space you have for rings or a red dot; choose based on the footprint of your optic.

Mounting and installation questions

How do I mount a dovetail adapter?

The supplied product information does not include installation steps, torque values, or required tools. In general, you will need to attach the adapter to your existing rail using the provided hardware, but confirm the method against the adapter you receive. If you are unsure, have a qualified gunsmith install it.

What is a picatinny to dovetail low profile mount used for?

The 20mm Picatinny to 11mm Dovetail Convert Mount is described as low profile and is intended to let you mount an 11mm dovetail scope or sight onto a Picatinny rail. The low profile design keeps the sight closer to the bore, but the exact height is not stated in the supplied information.

Do these adapters come with screws?

The product records do not list included hardware. Check the product listing or contact the seller before ordering if you need mounting screws.

Product facts for the Picatinny to dovetail mount

• 20mm Picatinny to 11mm Dovetail Convert Mount, Picatinny to Dovetail Rail Adapter, Low Profile Riser Rail Mount: 20mm picatinny base mount with 11mm Dovetail rail on top. Clarifies the interface direction: this adapter attaches to a Picatinny rail and provides an 11mm dovetail top for 11mm accessories.

  

• 20mm Picatinny to 11mm Dovetail Convert Mount, Picatinny to Dovetail Rail Adapter, Low Profile Riser Rail Mount: Designed for mounting an 11mm fitting scope/sight onto a picatinny rail. States the intended use so you can confirm it matches your scope or sight.
• 20mm Picatinny to 11mm Dovetail Convert Mount, Picatinny to Dovetail Rail Adapter, Low Profile Riser Rail Mount: Made out of 6061-T6 aluminum alloy. Indicates the material, which is relevant to weight and durability.
• 20mm Picatinny to 11mm Dovetail Convert Mount, Picatinny to Dovetail Rail Adapter, Low Profile Riser Rail Mount: Length available in 1.18", 2.36", 7", 10". Length options let you match the adapter to the size of your scope or sight and the space on your rail.

Compatibility and measurement questions

What is a 3/8 dovetail scope rail adapter?

The 11mm dovetail is often referred to as 3/8" dovetail. The 11mm 3/8" Dovetail To 7/8" 20mm Picatinny Rail Adapter Converter fits this type of rail. If your rail is described as 3/8" dovetail, this adapter is the matching option in our catalog.

Will the 11mm to 20mm adapter fit a 3/8" dovetail rail?

Yes, the product is listed as fitting an 11mm dovetail rail and is also described as a 3/8" dovetail adapter. These terms are commonly used interchangeably for the same rail width.

What is the difference between Picatinny and Weaver rails?

The product information states the top rail is Picatinny and that it allows mounting of Picatinny or Weaver standard scopes and red dots. Picatinny and Weaver are both transverse-slot rail standards, but they are not identical. The supplied information does not detail cross-slot dimensions, so confirm fit with your specific accessories.

Can I use these adapters on a air rifle or rimfire?

The product records do not specify firearm types or recoil ratings. The adapters are described only by rail interface. If you are unsure about suitability for your air rifle or rimfire, consult a gunsmith.

What the product information does not tell you

The supplied records do not include installation instructions, torque specifications, hardware lists, or firearm model compatibility. They also do not state the overall height or weight of either adapter. When a detail is not confirmed, treat it as unknown rather than assuming a standard. Measure your rail and accessories, and if you need precise figures, ask the seller before you buy.