---
product_id: 70929970
title: "360 Tactical Universal 21mm Weaver Picatinny Rail Base Adapter Converter Barrel Scope Mount Heavy Duty Scope Mount"
brand: "360 tactical"
price: "$21.57"
currency: USD
in_stock: true
reviews_count: 8
category: "360 Tactical"
url: https://www.desertcart.us/products/70929970-360-tactical-universal-21mm-weaver-picatinny-rail-base-adapter-converter
store_origin: US
region: United States of America
---

# Fits 21mm Weaver rails precisely Heavy-duty metal build Adjustable clamp fits 0.66-1.18 inch barrels 360 Tactical Universal 21mm Weaver Picatinny Rail Base Adapter Converter Barrel Scope Mount Heavy Duty Scope Mount

**Brand:** 360 tactical
**Price:** $21.57
**Availability:** ✅ In Stock

## Summary

> 🔫 Elevate your aim with the ultimate tactical rail adapter — don’t get left behind!

## Quick Answers

- **What is this?** 360 Tactical Universal 21mm Weaver Picatinny Rail Base Adapter Converter Barrel Scope Mount Heavy Duty Scope Mount by 360 tactical
- **How much does it cost?** $21.57 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/70929970-360-tactical-universal-21mm-weaver-picatinny-rail-base-adapter-converter)

## Best For

- 360 tactical enthusiasts

## Why This Product

- Trusted 360 tactical brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Multi-Accessory Ready:** Top rail supports scopes, sights, torches, and lasers for ultimate tactical customization.
- • **Rock-Solid Durability:** Crafted from premium aluminum alloy for shock absorption and long-lasting performance.
- • **Effortless Installation:** Tool-included clamp system makes mounting on 21mm Weaver rails quick and hassle-free.
- • **Universal Compatibility:** Adjustable two-piece design fits rifle tubes from 0.66 to 1.18 inches, ensuring a perfect fit every time.
- • **Battle-Tested Reliability:** Trusted by pros and enthusiasts alike for hunting, airsoft, and tactical war games.

## Overview

The 360 Tactical Universal 21mm Weaver Base Adapter is a heavy-duty, aluminum alloy scope mount designed for seamless installation on 21mm rails. Its adjustable clamp fits rifle barrels from 0.66 to 1.18 inches, providing a secure platform for scopes, sights, torches, and lasers. Engineered for shock absorption and durability, this adapter is perfect for hunting, airsoft, and tactical applications, backed by strong user reviews and professional-grade construction.

## Description

Brand new Color: Black Model: M0131 Material: Aluminium Alloy Net Weight: 73g Gross Weight: 86g Easy to install Fit on 21mm Rail Top Rail allow installation of scope, sight, torch, laser Constructed of metal material, extra strong shock Absorption ability Perfect for hunting, airsoft, war game Package Included: 1 X Rail Converter 1X Wrench

Review: 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 desertcart. 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!
Review: Great fit for Ithaca featherweight - Great product! Fit an Ithaca Featherweight perfectly, and I can even add a light or laser.

## Features

- Top Rail allow installation of scope, sight, torch, laser
- Constructed of metal material, extra strong shock
- Perfect for hunting, airsoft, war game
- Easy to install , Fit on 21mm Rail
- Absorption ability. Adjustable two-pieces design for rifle tube could adjust the compatible diameter range: from 0.66 inch to 1.18 inch.
- Adjustable two-pieces design for rifle tube could adjust the compatible diameter range: from 0.66 inch to 1.18 inch.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B079RFRDL8 |
| Best Sellers Rank | #35,957 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #13 in Airsoft Gun Scope Mounts |
| Brand | 360 Tactical |
| Brand Name | 360 Tactical |
| Color | Pack of 1 |
| Compatible Devices | Rifle |
| Customer Reviews | 4.5 out of 5 stars 720 Reviews |
| Item Display Weight | 73 g |
| Item Weight | 73 g |
| Magnification Minimum | 1 x |
| Manufacturer | 360 Tactical |
| Material | Aluminum, Metal |
| Material Type | Aluminum, Metal |
| Model Name | M0131 |
| Mounting Type | Picatinny Mount, Weaver Mount |
| Number of Packs | 1 |
| Objective Lens Diameter | 21 millimeters |
| Product Style | Tactical |
| Reticle Type | Cross |
| Sport | Airsoft, Hunting |
| Sport Type | Airsoft, Hunting |
| Style | Tactical |
| Thread Type | 1/2"-28 UNC |
| Unit Count | 1 Count |

## Product Details

- **Brand:** 360 Tactical
- **Color:** Pack of 1
- **Compatible Devices:** Rifle
- **Item Weight:** 73 Grams
- **Magnification Minimum:** 1 x
- **Material:** Aluminum, Metal
- **Mounting Type:** Picatinny Mount, Weaver Mount
- **Objective Lens Diameter:** 21 Millimeters
- **Sport:** Airsoft, Hunting
- **Style:** Tactical

## Images

![360 Tactical Universal 21mm Weaver Picatinny Rail Base Adapter Converter Barrel Scope Mount Heavy Duty Scope Mount - Image 1](https://m.media-amazon.com/images/I/5160fqya+NL.jpg)

## Questions & Answers

**Q: Will this fit on a Taurus model 692**
A: what???

**Q: Will this fit a 410 shockwave?**
A: Having the same problem I got both the 360 tactical 3 slot barrel clamp pictanny and this type. The 360 worked best for your type gun

**Q: Could this damage the feeding tube if tighten too hard ?**
A: No, the screws would strip before it could ever do damage

**Q: Would this fit a savage model 340 30-30?**
A: No

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality, fits my H&R 20ga shotgun barrel
*by K***. on March 17, 2025*

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!

### ⭐⭐⭐⭐⭐ Great fit for Ithaca featherweight
*by K***. on June 19, 2026*

Great product! Fit an Ithaca Featherweight perfectly, and I can even add a light or laser.

### ⭐⭐⭐⭐⭐ It fits a marlyn 1895 45-70
*by A***R on October 10, 2025*

It fits on my marlyn 1895 45-70 and helps me with attaching a light on my rifle the mounting is easy to do i just add electric tape to avoid scratches on the barrel the unit feels solid and doesn't wobble when mounted correctly worth the money to me

## Frequently Bought Together

- 360 Tactical Universal 21mm Weaver Picatinny Rail Base Adapter Converter Barrel Scope Mount Heavy Duty Scope Mount
- Feyachi Reflex Sight - Adjustable Reticle (4 Styles) Both Red and Green in one Sight!
- 11mm Dovetail to 21mm Upgraded Build-in Locking Screws Picatinny Rail Low Profile Scope Mount Converter Base 3/8" to 7/8" Converter

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**Shop now:** [https://www.desertcart.us/products/70929970-360-tactical-universal-21mm-weaver-picatinny-rail-base-adapter-converter](https://www.desertcart.us/products/70929970-360-tactical-universal-21mm-weaver-picatinny-rail-base-adapter-converter)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-08-24*