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🔫 Lock, Load & Level Up Your Tactical Game
The 360 Tactical Universal 21mm Weaver Base Adapter is a heavy-duty, metal scope mount designed for rifles with 21mm rails. Featuring a robust 3-screw clamp and adjustable two-piece design, it fits barrel diameters from 0.66 to 1.18 inches, ensuring a secure, shock-absorbing hold. Ideal for hunting, airsoft, and tactical applications, it supports multiple accessories like scopes, lights, and lasers, delivering professional-grade stability and versatility.



| ASIN | B079RFRDL8 |
| Best Sellers Rank | #35,443 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #19 in Airsoft Gun Scope Mounts |
| Brand Name | 360 Tactical |
| Color | Pack of 1 |
| Compatible Devices | Rifle |
| Customer Reviews | 4.5 4.5 out of 5 stars (935) |
| Item Weight | 73 Grams |
| Magnification Minimum | 1 x |
| Manufacturer | 360 Tactical |
| Material Type | Aluminum, Metal |
| Mounting Type | Picatinny Mount, Weaver Mount |
| Night vision | No |
| Objective Lens Diameter | 21 Millimeters |
| Product Style | Tactical |
| Reticle Type | Cross |
| Sport Type | Airsoft, Hunting |
| Unit Count | 1.0 Count |
A**E
Solid mount and easy to install
This adapter is surprisingly solid for the price. The machining looks clean and the metal feels sturdy, not cheap or flimsy. Installation was very simple and the included Allen key made it quick to secure everything. Once mounted it holds very tight and doesn’t shift or move, even after repeated use. The rail fits accessories properly and everything lines up the way it should. Overall it does exactly what it’s supposed to do. Good quality, simple installation, and very good value for the money. Would definitely recommend it.
K**E
Worked well to add a flashlight to a 20 gauge Mossburg 500 shotgun
Used this to mount a flashlight to the end of the feed tube on my old 20 gauge Mossburg 500 shotgun. I have only shot it a couple of times since adding this, but it clamped down and stayed in place well. Seems well made, solid metal. Comes with the Allen key needed to tighten it down. I can't comment on durability yet, but it seems solid.
A**Y
Easy to put on
Fits multiple barrels and is study enough to mount a light on.
K**.
Good quality, fits my H&R 20ga shotgun barrel
I purchased this clamp-on rail to fit on the barrel of my H&R 20 ga Snake Tamer shot gun. I put a weapon light on it. The mount fit perfectly. Even though the barrel has a slight taper to it, the 3-screw clamp allowed full barrel contact and after testing it with heavy load 3" mag shells, the mount and light remained unmoved. I am very happy with it. The weapon light that I placed on the mount was a "Feyachi HL-20 Pistol Light 1500 Lumen LED", which I also purchased from Amazon. The light was a great purchase at $32. It is amazing bright and can be focused from wide throw to spot. I will buy a few more. I am a retired police officer after 50+ years and I own three (3) pistol Streamlights and this beats them by brightness and price. Appears to be very well constructed. The rail mount and the Feyachi are a great combo!
A**R
Simple installation
Great fit on my mossberg 590.
J**N
Just as described
Perfect answer for mounting picatinny rail on 20 ga shotgun barrell
A**R
For what it is
Bought to mount light on Ruger 10/22: didn't work. Too large. Works on a shotgun.
T**R
Airgun Hobbiest
Perfect and secure fit to customize barrel or PCP tubes for accessories.
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