11mm Dovetail to 21mm Upgraded Build-in Locking Screws Picatinny Rail Low Profile Scope Mount Converter Base 3/8" to 7/8" Converter

Worked perfect

This is a quality item that grips my Hatsan Mod 25 pistol's 11mm dovetail rails firmly, and I had no trouble mounting Picatinny optics on the top of it. It has three holding screws which is very appropriate for the air guns it will mostly be mounted on (they have intense recoil shocks). The screws are small Torx head for which the vendor supplies the proper "hex" key.My only recommendation would be to make the screws larger in diameter or of high-grade steel. That's because you may want to use loc-tite / threadlocker on them, and even the blue version of that stuff can hold so tight that you won't be able to get these screws out without snapping them off. Don't ask me how I know this.

Great product. You only receive one rail though. Not sure why the picture shows two, but it’s definitely a good purchase.

I’m giving this five stars, because it appears to be well made and “fit for purpose.” But I bought it for a Beretta shotgun; and the ventilated rib on that gun—and a half dozen other guns I tried it on—is too narrow to mount this rail on it. Matter of fact, I can’t find any similar rail that *will* fit. Smallest they go is 11mm; my rails are 9mm or less. So, be aware!

fit perfectly on my savage .22. Locks tightly. Have hunted with it for about 6 months now. I rotate sights depending on light. This has stayed tight the entire time. My only regret is not getting a longer rail but that's on me.

Well made/ sturdy/ easy installation

Worked very well but the tool that comes with it is too short to crank it down enough. The scope fell off after 10 shots and I had to use a T16 bit to crank it down tighter

Buy it