Will this fit a CZ 457?

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.

Will this work for gamo magnum g2 or maxxus g2?

Don’t know but it is 15mm bottom and 20mm top I use it on a crossbow

Has anyone got this to fit on a Ruger break barrel air rifle? The top of the dovetail is curved, not flat.

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

Will it mount a 20mm red dot ?

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.

Lonsel Dovetail To Picatinny Rail Adapter 11mm Dovetail To 21mm

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

🔧 Elevate Your Aim with Precision & Style

SEAMLESS RAIL CONVERSION - Effortlessly transform your 11mm dovetail mount to a versatile 21mm Picatinny rail, expanding your optics and accessory options.
OPTIMIZED LOW PROFILE DESIGN - At just 0.59" riser height, maintain a sleek, tactical look while improving your scope’s line of sight and stability.
EXPANDED MOUNTING FLEXIBILITY - Featuring 9 Picatinny slots over a 3.94" length, customize your setup with scopes, red dots, or other tactical accessories.
PRECISION ENGINEERED DURABILITY - Crafted from premium aircraft-grade aluminum with a sleek black hard coat anodize finish for unmatched strength and longevity.
TOOL ASSISTED SECURE INSTALLATION - Includes an allen wrench and locking screws for a rock-solid, shake-free mount that stays locked in place during intense use.

The LONSEL Dovetail to Picatinny Rail Adapter is a precision-machined, aircraft-grade aluminum mount that converts 11mm dovetail rails to 21mm Picatinny rails. Its low-profile 0.59" riser design with 9 slots offers versatile mounting options for scopes and accessories, ensuring a secure, shake-free fit with included locking screws and installation tools. Perfect for professionals seeking reliable, durable upgrades to their tactical gear.

Reviews

S**Y

Details need to better worded but over all, GREAT!

This came in quick, it worked well for the fun, the only thing is, that the listing of said item was confusing as to which sizes there were. So because of how the product was listed, we got the wrong rail adapter, but it was still able to work for the gun. It really is a great product, sturdy and durable just make sure to really check the wording and the sizing for the best fit.

7.05.2026

D**K

Works perfectly with Citadel 12 Gauge Warthog

I have a Citadel 12 Gauge Turkish Warthog Semi-Auto Shotgun with dovetail rails on the top of the receiver. This fit it perfectly. Once tightened, the tap doesn’t move and looks it was made to fit. It is well made, has a great anodized finish without any blemishes. I highly recommend this if you the same shotgun as I do. I am sure it will serve me very well. I plan to mount a red dot on this rail very soon.

6.05.2026

K**L

Great product

Works well, it fits my .177 pellet rifle, it was purchased to house a scope.

6.05.2026

W**S

22 Rail receiver scope base mount adapter 11mm to 21mm Picatinny.

Older model 22 rim fire grove was v-cut into the receiver with Round over remaining, not flat. Your adapter should have a relief cut for round receiver, C-cup. Other wise your LONSEL adapter ok. Adjustability ok, Quality ok, ease to use ok, durability ok. Price ok. Fit Installation needs round receiver application, will you make one for my older 22 rifle Mossberg purchased new 1968. Want to mount night vision scope with built in rings for Picatinny.

27.04.2026

P**R

Sturdy and secure

Perfect fit for my Marlin model 60 22lr. I mounted a Vortex triumph 3-9x40 scope and it worked perfectly. Very easy to install and it clamps down securely.

6.05.2026

J**K

perfect

nice and durable. fits perfectly.

17.04.2026

I**N

Low price and high quality

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.

22.02.2026

D**N

Just information

I have Madeline my neck which prevents me from bending my head backwards in the prone position so it needs to be a little higher but otherwise it's a great base very solid and does a good job

12.09.2025

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ASIN	B0982V87YJ
Best Sellers Rank	#5,260 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Sporting Optics Mounts
Brand Name	LONSEL
Color	Black
Customer Reviews	4.5 4.5 out of 5 stars (3,241)
Date First Available	June 28, 2021
Item Package Dimensions L x W x H	5.83 x 3.15 x 0.75 inches
Manufacturer	LONSEL
Material	Aluminum
Package Weight	0.06 Kilograms
Style	1 PACK - 9 Slots

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

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