--- product_id: 279432752 title: "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: "€ 33.48" currency: EUR in_stock: true category: "Lonsel" url: https://www.desertcart.hr/products/279432752-dovetail-to-picatinny-rail-adapter-11mm-dovetail-to-21mm-picatinny store_origin: HR region: Croatia --- # 3.94-inch extended Picatinny rail Secure 3-screw locking system Precision aircraft-grade aluminum 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:** € 33.48 **Availability:** ✅ In Stock ## Summary > 🔫 Elevate your optics game—convert, mount, and dominate with precision! ## Quick Answers - **What is this?** 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?** € 33.48 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/279432752-dovetail-to-picatinny-rail-adapter-11mm-dovetail-to-21mm-picatinny) ## 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 - • **Extended Flexibility:** 3.94-inch Picatinny rail with 9 slots offers versatile optics placement—perfect for scopes, red dots, and tactical accessories. - • **Rock-Solid Stability:** Triple high-strength locking screws and included Allen wrench ensure zero-shake, zero-wobble performance under recoil. - • **Effortless Installation:** Tool-assisted dovetail mount with vertical stop pin makes setup quick and secure—no gunsmith required. - • **Engineered for Precision:** Crafted from premium aircraft-grade aluminum with a matte black hard coat anodize finish for unmatched durability and sleek stealth. - • **Low-Profile Riser Design:** Only 0.59 inches tall, this riser rail maintains a sleek profile while optimizing eye relief and mounting height. ## Overview The LONSEL Dovetail to Picatinny Rail Adapter converts 11mm dovetail mounts to a 21mm Picatinny rail, extending your mounting options with a durable, low-profile 0.59-inch riser. Precision-machined from aircraft-grade aluminum with a matte black anodized finish, it features a 3.94-inch rail with 9 slots for flexible optics placement. Easy to install with a secure 3-screw locking system and included Allen wrench, this adapter ensures stable, shake-free performance for professional-grade scope setups. ## 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) ## 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 | #4,877 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #5 in Sporting Optics Mounts | | Brand Name | LONSEL | | Color | Black | | Customer Reviews | 4.5 4.5 out of 5 stars (3,444) | | 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 | | Package Weight | 0.14 kg | | Style | 2 PACK - 9 Slots | ## Images ![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. ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/279432752-dovetail-to-picatinny-rail-adapter-11mm-dovetail-to-21mm-picatinny](https://www.desertcart.hr/products/279432752-dovetail-to-picatinny-rail-adapter-11mm-dovetail-to-21mm-picatinny) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-10-23*