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Madbull Airsoft JP Customizable Length M4 AEG Outer Barrel Kit

SKU: VS-JAG-JPGBK-F MadbullOut of stock

  • - Adjustable length
  • - Lightweight build
  • - Constructed with aluminum
  • - Black oxide coating
  • - Mock gas tube included
  • - Sturdy construction
  • - Two-piece design with a one-piece feel
  • - Stress-free barrel extension assembly


Madbull Airsoft JP Customizable Length M4 AEG Outer Barrel Kit

The Madbull JP Gas Block Kit is truly one of a kind in the airsoft world. It allows you to have four different lengths of outer barrels without having to buy each one individually for a steeper price. Even though it’s a two-piece barrel, the Madbull JP Gas Block Kit uses large threads and a set screw to achieve the sturdiness of a one-piece barrel. It’s lightweight in comparison with other one-piece barrels and is constructed with aluminum. This kit will allow you to use almost any rail system on the market and to be able to switch outer barrels at any time without the hassle of removing the rail system first.

NOTE: Airsoft Megastore recommends that all internal upgrades and/or repairs be handled by a qualified airsoft technician. Airsoft Megastore is NOT responsible for improperly installed replacement or upgrade airsoft parts. DO NOT disassemble your airsoft gun within Airsoft Megastore’s warranty period, as this will VOID your warranty.

In the Box

Outer barrel w/ compensator

3x barrel extensions

gas block

mounting pins


Construction Aluminum
Barrel Lengths 24"/ 20"/ 18"/ 16" in. (Length can be adjusted by using included extensions)
Compatibility Will work with M4 / M16 rifles

California Proposition 65 Warning: Cancer and Reproductive Harm -

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