Tokyo Marui M870 Breacher Gas Shotgun

Tokyo Marui M870 Breacher Gas Shotgun

The Ultimate CQB Door-Kicker. Compact. Devastating. Reliable.

When it comes to clearing tight indoor rooms and locking down close-quarters battle (CQB) skirmish sites, nothing matches the raw intimidation and sheer fun of a pump-action shotgun.

The Tokyo Marui M870 Breacher is the ultimate, shortened evolution of TM’s legendary gas-powered M870 platform. By ditching the bulky stock of the full-size version, shortening the barrel, and integrating a Pachmayr-style pistol grip, Tokyo Marui has created a highly manoeuvrable, metal-bodied scattergun that is perfect as a high-speed primary or a secondary breaching tool strapped to your back.

With a simple rack of the slide, you get that satisfying "clunk-click" and a wall of BBs heading downrange.

Why the M870 Breacher Dominates the CQB Arena

1. Dual-Shot Selector (3-Shot or 6-Shot Burst)

Hidden neatly inside the ejection port is a simple, mechanical selector switch. This allows you to cycle between two distinct firing modes depending on your tactical needs:

• 3-Shot Mode: Gives you a tighter spread and maximum gas efficiency—perfect for taking mid-range shots out to the edges of the room.
• 6-Shot Mode: Fires a massive, wide-spreading wall of 6 BBs with a single trigger pull, instantly sweeping hallways and clearing doorways.

2. Double Hop-Up System

Firing multiple BBs at once usually means sacrificing accuracy. Tokyo Marui solves this by utilizing an advanced double hop-up system connected to three independent inner barrels. Whether you are shooting 3 or 6 rounds, every single BB receives backspin, delivering flat, consistent, and predictable trajectories.

3. Rapid-Fire / Slam-Fire System

In a high-intensity firefight, speed is everything. The Breacher features a slam-fire system. Simply hold down the trigger and pump the forend repeatedly, the shotgun will fire instantly each time the slide locks forward, allowing you to lay down a terrifying volume of close-range suppressive fire.

4. Rugged Full-Metal Construction

This isn't a fragile plastic toy. The outer barrel, receiver, trigger plate, and assembly are constructed from high-strength die-cast aluminium. It gives the Breacher an incredibly solid, realistic 2.2 kg weight that can easily handle the physical demands of aggressive CQB play.

5. Removable Gas Tank System

The gas reservoir is housed entirely inside the pistol grip. With a simple quick-release mechanism, you can swap out cold gas tanks mid-game in seconds, meaning you don’t have to carry a bottle of green gas onto the field with you.

Technical Specifications

• Power Source: Gas Operated (Non-Blowback)
• Length: 515mm (Perfect for Tight Spaces and Holsters)
• Weight: 2,200g (Fully Balanced, Full-Metal Feel)
• Inner Barrels: 3 Barrels (197mm Length)
• Firing Modes: 3-BB or 6-BB Burst (Switchable)
• Magazine Capacity: 30 Rounds (Utilises Standard TM Shotgun Shells)
• Muzzle Velocity: 280 - 300 FPS (Safe and Legal on All UK Indoor/CQB Sites)

BZ Tech Team Setup Guide: The HPA-Tapped Monster

Want absolute performance? Go HPA. If you are a dedicated CQB speedsofter or want to run the Breacher in freezing winter weather without experiencing low gas pressure, the ultimate upgrade is HPA-tapping.

Many players drop in an M4 Magazine Adaptor paired with a CQB HPA line. This setup completely eliminates the physical gas tank, gives you incredibly consistent FPS, and allows you to use standard M4 mid-cap magazines for hundreds of continuous shots without reloading shells! Check out our HPA and adapter section to upgrade your build.

UKARA & Two-Tone Notice: A valid UKARA number or registered skirmisher defence is required to purchase this realistic imitation firearm in its original tactical black finish. If you do not have a registered defence, please choose our professional Two-Tone Service at checkout. We will paint over 51% of the shotgun in a bright, legally compliant colour (please allow up to 10 additional days for processing).