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Madbull AK PBS-04 Barrel Extension

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Free Shipping over $125 ($9.99 for orders under $125)

Fox Airsoft offers a 30 day warranty and return policy.

About the MadBull AK PBS-4 Barrel Extension

If you are looking for a correct-looking barrel extension for your AK, the PBS-4 replica by Madbull is authentic for that look. Be warned that AKs may come in -14mm or +24mm thread so please verify your fitment. This will add a bit of weight to the end of your airsoft gun. This is a CNC aluminum barrel extension yet it has some heft to it.

The real PBS-4 is a suppressor designed to be used with Krinkov style AKs which featured a very short barrel and fired the 5.45x39mm cartridge. Though it is a rare sight out in the wild, you may have seen these in the hands of some old school Russian operators who ran short barreled rifles like the AKS-74U. With variants of the 5.45mm style AKs still remaining popular and in service, having a mock suppressor like this one adds a high degree of authenticity. Also this unit being made of aluminum, the can still has a good weight to it. The real counterpart believe it or not is a crudely designed steel unit that weighs a ton. Now you can have that mock PBS-4 look without any of the weight penalties.

Madbull is a high quality airsoft accessory and part manufacturer who has been in the game since 2004. Their licensed rail systems and barrel extensions are some of their most well known products.  With many licenses including Daniel Defense, Noveske, and more, Madbull is always bringing you the most authentic accessories out there. Madbull is known for their high manufacturing standards. using such processes as precision CNC, castings, engravings, as well as anodizing and finishes.

Note: This unit is heavier than most mock suppressors. Take extra car when mounting or using it that you do not hit into something that could damage your front end in the process,,

Note: airsoft barrel extensions aka mock suppressors aka mock silencers do not hold any noise suppression capabilities. All airsoft barrel extensions sold in the US must comply with federal law and cannot be modified to be functional as suppressors. All airsoft mock suppressors should have solid internals with no ability to change or modify the inside. These airsoft barrel extensions will not work on real firearms.

Note: Removing your orange tip voids your manufacturer warranty (if applicable). Also if you mount this mock suppressor to your airsoft gun we will not accept any returns on it for it is now in used conditions. Though the orange tip on an airsoft gun is required by law for importation and sales purposes, once the gun is in your possession you are at the discretion of local laws for whether or not the orange tip is still required. Nonetheless, treat these airsoft guns with the same regard you would for a real gun and practice safety and common sense.

What's Included In The Box: 

  • 1 x MadBull PBS-4 AK style barrel extension

Quick Overview:

  • Full Metal Construction (Aluminum)
  • authentic AK-look barrel extension
  • Over 2lbs in weight
  • -14mm thread


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