---
product_id: 39610143
title: "GrovTec US Mtmx3 Extended Magazine Tube Mount X3 Remington 870"
brand: "grovtec us"
price: "¥17793"
currency: JPY
in_stock: true
reviews_count: 4
url: https://www.desertcart.jp/products/39610143-grovtec-us-mtmx3-extended-magazine-tube-mount-x3-remington-870
store_origin: JP
region: Japan
---

# Sleek black finish Fits Remington 870 Proudly made in the USA GrovTec US Mtmx3 Extended Magazine Tube Mount X3 Remington 870

**Brand:** grovtec us
**Price:** ¥17793
**Availability:** ✅ In Stock

## Summary

> 🔫 Elevate Your Game with GrovTec's Ultimate Upgrade!

## Quick Answers

- **What is this?** GrovTec US Mtmx3 Extended Magazine Tube Mount X3 Remington 870 by grovtec us
- **How much does it cost?** ¥17793 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/39610143-grovtec-us-mtmx3-extended-magazine-tube-mount-x3-remington-870)

## Best For

- grovtec us enthusiasts

## Why This Product

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

## Key Features

- • **Sleek Aesthetic:** Stylish black finish complements your firearm
- • **Easy Installation:** User-friendly design for quick setup
- • **Durable & Reliable:** Constructed from high-quality materials for longevity
- • **Precision Engineering:** Designed specifically for Remington 870 12 Gauge
- • **Maximize Your Firepower:** Extended magazine tube for enhanced capacity

## Overview

The GrovTec US Mtmx3 Extended Magazine Tube Mount X3 is expertly designed for the Remington 870 12 Gauge, offering a sleek black finish and easy installation. Proudly made in the USA, this mount enhances your firearm's capacity and performance, ensuring you stay ahead in any situation.

## Description

Provides three different ways to mount your sling or accessories; a Picatinny rail, a push button base and a standard locking swivel stud. The steel magazine tube mount gives extra security to the 12 gauge extended magazine tube. Rail and push button base are reversible and can be mounted to either side. Made in the USA. Specifications:- fits: Remington 870 12 gauge- color: black.

## Features

- Fits: Remington 870 12 Gauge
- Color: black
- Made in the USA

## Images

![GrovTec US Mtmx3 Extended Magazine Tube Mount X3 Remington 870 - Image 1](https://m.media-amazon.com/images/I/41Sz0rWkuuL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ 







  
  
    It works
  

*by D***H on Reviewed in the United States 🇺🇸 on February 23, 2021*

The picatinny is cool but there should be an option not to include it.

### ⭐⭐⭐⭐ 







  
  
    Problems with fit, but awesome customer service
  

*by M***0 on Reviewed in the United States 🇺🇸 on June 18, 2016*

The Grovtec 870 kit that I received did not fit my 870 Express with factory +2 extension. After a couple of pleasant emails to customer service, Grovtec sent out the bracket for a Remington 1100/Mossberg 500, which fit my application perfectly.The finish doesn't match the Express finish and the rail is a bit too bulky, but I'm very pleased overall with Grovtec, especially their fantastic customer service.

### ⭐⭐⭐⭐ 







  
  
    As described
  

*by S***T on Reviewed in the United States 🇺🇸 on December 20, 2018*

Great product and exactly as described just a little pricy for what it is

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**Shop now:** [https://www.desertcart.jp/products/39610143-grovtec-us-mtmx3-extended-magazine-tube-mount-x3-remington-870](https://www.desertcart.jp/products/39610143-grovtec-us-mtmx3-extended-magazine-tube-mount-x3-remington-870)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-18*