---
product_id: 279432752
title: "LONSEL Dovetail to Picatinny Rail Adapter 11mm Dovetail to 21mm Picatinny Rail Convert Mount - Low Profile Scope Riser Rail Adaptor - Base Mount 3/8\" to 7/8\" Converter"
brand: "lonsel"
price: "VT5911"
currency: VUV
in_stock: true
reviews_count: 8
category: "Lonsel"
url: https://www.desertcart.vu/products/279432752-lonsel-dovetail-to-picatinny-rail-adapter-11mm-dovetail-to-21mm
store_origin: VU
region: Vanuatu
---

# 3.94-inch extended Picatinny rail Secure 3-screw locking system Precision aircraft-grade aluminum LONSEL Dovetail to Picatinny Rail Adapter 11mm Dovetail to 21mm Picatinny Rail Convert Mount - Low Profile Scope Riser Rail Adaptor - Base Mount 3/8" to 7/8" Converter

**Brand:** lonsel
**Price:** VT5911
**Availability:** ✅ In Stock

## Summary

> 🔧 Elevate your aim with precision and style — don’t settle for less!

## Quick Answers

- **What is this?** LONSEL Dovetail to Picatinny Rail Adapter 11mm Dovetail to 21mm Picatinny Rail Convert Mount - Low Profile Scope Riser Rail Adaptor - Base Mount 3/8" to 7/8" Converter by lonsel
- **How much does it cost?** VT5911 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/279432752-lonsel-dovetail-to-picatinny-rail-adapter-11mm-dovetail-to-21mm)

## Best For

- lonsel enthusiasts

## Why This Product

- Trusted lonsel brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Effortless Installation:** Tool-assisted quick setup with included Allen wrench—get your gear battle-ready in minutes.
- • **Expanded Optics Options:** 9-slot Picatinny rail offers versatile mounting for scopes, red dots, and tactical accessories.
- • **Precision Fit, Zero Shake:** Three high-strength locking screws and vertical stop pin ensure rock-solid stability under any condition.
- • **Ultimate Compatibility Upgrade:** Seamlessly converts 11mm dovetail to 21mm Picatinny rail for maximum accessory flexibility.
- • **Rugged Durability Meets Sleek Design:** Crafted from aircraft-grade aluminum with matte black hard coat anodize for a low-profile, resilient mount.

## Overview

The LONSEL Dovetail to Picatinny Rail Adapter expertly converts 11mm dovetail mounts to a 21mm Picatinny rail, extending your scope and accessory options. Made from aircraft-grade aluminum with a matte black anodized finish, it offers a durable, low-profile 0.59-inch riser design. Featuring a 3.94-inch rail with 9 slots and a secure 3-screw locking system, this adapter ensures stable, shake-free mounting and easy installation with included tools. Perfect for professionals and enthusiasts seeking enhanced tactical versatility.

## Description

LONSEL Dovetail to Picatinny Rail Adapter 11mm to 21mm Rail Low Profile Converter Adapters - Provide 1 Pack & 2 Pack to Meet Your Different Needs! Lightweight & Durable ｡◕‿◕｡Precision Machined from aircraft grade aluminum and finished in a matte black hard coat anodize, durable solid structure. 11mm To 21mm Rail Convert Adapter ｡◕‿◕｡Compatible with 11mm or 3/8" dovetail mounts, can be used to convert to 21mm picatinny rail mount, allowing for more flexible optics. Low Profile Riser Rail Design ｡◕‿◕｡3.94" picatinny rail with 9 Slots with a 0.59" saddle height riser rail, provides more flexible optics placement and eye relief. Flexible Application ｡◕‿◕｡The adaptor's picatinny rail allows for the mounting of standard picatinny scopes, red dots, or other optics. Easy to Install ｡◕‿◕｡Three high strength locking screws ensure a solid mount-to-receiver lock up, attached allen wrench can help you to ensure tight enough, keep stable and no shaking. Package List ♣ [2 PACK]: 2 x 11mm Dovetail to Picatinny Rail Adapter + 2 x Allen Wrench (Optional) ♣ [1 PACK]: 1 x 11mm Dovetail to Picatinny Rail Adapter + 1 x Allen Wrench (Optional)

Review: Great product. - It fit perfectly with my scope. Seems high quality. Great value for the money.
Review: Works great for a dovetail mount. - Fits perfectly on my marlin 22 mag.

## Features

- 100% Matte
- Imported
- Precision Material: Premium out of aircraft grade aluminum alloy and black hard coat anodize finish, sturdy & durable.
- Convert 11 mm Dovetail to 21 mm Picatinny Rail: 2.94 inches length at the base, the picatinny rail extends 3.94 inches allowing for more flexible optics placement.
- Mount Base: Fit 11 mm dovetail mounts, Base mount 3/8" to 7/8" converter adapter. Low profile 0.59" riser rail for scope.
- Top With 9 Slots Style Rail: Top 21mm picatinny rail allows for the mounting of picatinny standard scopes, red dots or other accessories.
- Easy To Install: Rail adaptor installs easily via dovetail mount and one vertical stop pin, attached allen wrench can help you to tight stable and no shaking.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08SC867NL |
| Best Sellers Rank | #3,603 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #3 in Sporting Optics Mounts |
| Brand Name | LONSEL |
| Color | Black |
| Customer Reviews | 4.5 4.5 out of 5 stars (3,087) |
| Date First Available | January 7, 2021 |
| Item Package Dimensions L x W x H | 5.94 x 3.27 x 0.71 inches |
| Manufacturer | LONSEL |
| Material | Aluminum |
| Package Weight | 0.14 Kilograms |
| Style | 2 PACK - 9 Slots |

## Images

![LONSEL Dovetail to Picatinny Rail Adapter 11mm Dovetail to 21mm Picatinny Rail Convert Mount - Low Profile Scope Riser Rail Adaptor - Base Mount 3/8" to 7/8" Converter - Image 1](https://m.media-amazon.com/images/I/71p+YQ55+gL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Will this fit a CZ 457?**
A: If the seller/manufacturer has stated the specifications correctly, it should "fit". AFAIK, 11mm on a CZ 457 is still 11mm on an air rifle. A few IMPORTANT caveats to keep in mind: (1:) I've not tried this product & do not "vouch" for it. (2.) When a mfr refuses to provide dimensional drawings, you SHOULD question their claims! (3.) Wrt the CZ 457, you really should COMPARE THIS to other products offered - note the diffs.

**Q: Will this work for gamo magnum g2 or maxxus g2?**
A: Don’t know but it is 15mm bottom and 20mm top I use it on a crossbow

**Q: Has anyone got this to fit on a Ruger break barrel air rifle?  The top of the dovetail is curved, not flat.**
A: that should not matter as all of my guns with a 11mm rail are curved as in cut into the side of a round tube

**Q: Will it mount a 20mm red dot ?**
A: Yes, it will mount a red dot scope with a picatinny base.  In fact, I have a red dot scope on a Lonsel adapter on my Weihrauch HW97K air rifle.   It puts 22 cal. pellets in the "X" Ring of the target, one after another in the same hole:  very accurate..... This is a sturdy, well constructed product.    D.W.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great product.
*by A***Y on February 15, 2026*

It fit perfectly with my scope. Seems high quality. Great value for the money.

### ⭐⭐⭐⭐⭐ Works great for a dovetail mount.
*by B***F on February 16, 2026*

Fits perfectly on my marlin 22 mag.

### ⭐⭐⭐⭐⭐ Low price and high quality
*by I***N on February 22, 2026*

I used this adapter to install a red/green dot sight on my pellet gun. It was easy to install and it grips the dovetail nice and tight. The price is low and the quality is high. I am very happy with this purchase.

## Frequently Bought Together

- LONSEL Dovetail to Picatinny Rail Adapter 11mm Dovetail to 21mm Picatinny Rail Convert Mount - Low Profile Scope Riser Rail Adaptor - Base Mount 3/8" to 7/8" Converter
- LONSEL 1'' Scope Rings, 2Pcs High Profile or 2Pcs Medium Profile 1 Inch Scope Mount Rings for Picatinny Rail
- LONSEL 1'' Dovetail Scope Rings, 2 Pack High Profile or Medium Profile 1 Inch Scope Mount Rings for 11mm Dovetail Rails

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-07*