Kublai Full Metal JailBreak M4 Gel Blaster


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The Next Generation of High Quality Full Metal Gel Blasters Has Arrived!

The New Kublai/WAT JailBreak M4 Gel Blaster has been manufactured by Kublai and Cyma.  These 2 powerhouses have produced a great Blaster, not only metal receiver and handguard but internals as well with a metal gearbox shell and gears.  This is a serious gel blaster, for those looking to take their game to the next level.

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Kublai Full Metal JailBreak M4 Gel Blaster


  • Brand: Kublai
  • Model: JailBreak
  • Released: June 2020
  • Type: Automatic / Battery Operated
  • Firing Modes: Semi-Auto / Full-Auto
  • High Quality Full Metal Split Receiver
  • High Quality Full Metal 14″ Handguard
  • V2 Metal Gearbox with Metal Gears
  • High Torque Performance Motor
  • Nylon Magazine
  • Metal Outer Barrel
  • Alloy Inner Barrel
  • Metal Buffer Tube
  • Extendable Nylon Core CP Butt Stock
  • Metal Fire Select
  • Metal Mag Release
  • Metal Charging Handle
  • Metal Trigger
  • Quick Release Removable Handguard
  • Quick Release Removable Upper Receiver
  • 7.4v Battery with Tamiya Plug
  • Uses 7-8mm Gel Balls


  • Length:
      • Stock Retracted: 76.5cm
      • Stock Extended: 81cm
  • Width: 7cm
  • Height: 22.7cm
  • Weight: 2710g


  • Up to 280 Feet Per Second
  • Up to 15 Rounds Per Second (11v)
  • Up to 25m Firing Distance

Package Includes:

  • 1 x Metal Gel Blaster
  • 1 x Metal Magazine
  • 1 x 7.4v Battery
  • 1 x USB Charger
  • 1 x 5000 Pack of Gel Balls
  • 1 x Coloured Illustrated Instructions with Chinese

IMPORTANT NOTE: The wiring in this Blaster is reversed polarity and therefore is only compatible with the battery provided. Using any other battery will cause damage to battery/wiring. Wiring must be changed over to work with other batteries.

Gel Ball Hydration 101


  1. Pack of Gel Balls
  2. Bucket
  3. Water

Gel ball / water ratio:

  • 10,000 pack / 4L water
  • 5,000 pack / 2L water
  • 500 pack / 200ml water


Step 1: Empty gel ball pack into bucket.

Step 2: Fill bucket with water (more is better).

Step 3: Allow gel balls to soak for 6 hours minimum! (Overnight recommended)

 Your gel balls are now ready to use.

Storage: Up to 2 weeks in an airtight container away from sunlight. For best results, store in water and strain when needed.


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