5KU 20mm Picatinny Railed Gas Tube for GHK AK GBBR

Code: 5KU-261
  • Aluminium construction
  • 20mm Picatinny rail built in
  • For the GHK AK GBBR series

Adding rails to your AK can be a chore, but users of the superb GHK AK GBBR platform now have one more option! Introducing the 20mm Picatinny Railed Gas Tube for GHK AK GBBR, an aluminium replacement gas tube with a 20mm Picatinny rail built into its upper surface. This rail is great for a forward-mounted optic but has plenty of space for mounting a tactical flashlight and also a PEQ laser if you have your primary sight mounted on a rail further back. If you are looking for a simple way to give your GHK AK GBBR a hint of modernity, this is the perfect piece!

Full description


The 5KU railed gas tube is constructed from aluminium with a steel insert at the front, matching real steel designs which reinforce this part which bears the brunt of all of the hot gasses used to cycle the real steel AK action. This gas tube is based on the real steel M.I design and sports 9 slots of 20mm Picatinny rail up top; perfect for adding forward-mounted red dot sight. If you already have an optical sight on your AK, this rail could be used to add a PEQ and tactical flashlight as there is just about enough room if you use the right mounting apparatus.

If you want to fully deck out your AK with western lasers and lights, but you don't want to give up your wooden lower handguard, this part would be perfect for the job!


  • Aluminium construction
  • Steel front insert
  • Ideal for forward-mounted optical sights
  • Provides 9 slot 20mm Picatinny rail
  • Drop in replacement for your gas tube
  • Compatible with the GHK AK GBBR - May fit other GBBRs with mods

Package Includes

  • 5KU 20mm Picatinny Railed Gas Tube for GHK AK GBBR



External Part Type
Rail, Gas tube,
Package Includes
AK Gas tube with 20mm rail
Patrol Base - Warning Icon
Patrol Base - Warning Icon
Parts Fitting


Colour Wheel Greyscale
Item Colour
Construction Icon
Aluminium with steel front insert.

Weight and Dimension

Product Height
Approx. 3.2cm
Product Length
Approx. 17.4cm
Product Width
Approx. 2.5cm
Weight KG Icon
Weight (KG)
Approx. 0.115kg

Part Specific

Rail System Icon
Rail System
20mm RIS / RAS
Weapon Platform
AK Platform, GHK AK GBBR,

Mount Specific

Mount Type
Rail Adaptor