- CNC Aluminium construction
- 20mm Picatinny top rail
- Fits most AK47/74 AEGs & GBBRs
Complete your modern AK build with the 5KU Zco Style B-31L Gas Tube Cover for AK-74/AK-105. Inspired by the real steel Zco Sport-1 handguard system, this CNC aluminium gas tube cover offers a lightweight, slimline design with modern styling and practical accessory mounting.
A skeletonised 20mm Picatinny rail runs along the top, providing space for a tactical flashlight, laser aiming module or forward-mounted red dot sight without adding unnecessary bulk. Its slim profile offers a comfortable grip, making it an excellent choice for ergonomic, modern AK builds.
The B-31L is compatible with most VFC/LCT-style AK AEGs and GBBRs, including many CYMA, Specna Arms, ARCTURUS and S&T platforms, although minor fitting may be required. It is not compatible with AKS-74U models and must be installed alongside a compatible 5KU Zco-style lower handguard.
Fast Delivery
Delivery & Postage
Here at Patrol Base, we send all our packages from our Warehouse based in the UK with the exception of European Warehouse Items. All of our parcels are sent with specially picked couriers to ensure your parcels get to you on time and in one piece.
For more information please check out our Delivery Information Page.
Estimates
Below are some rough postage prices for orders. Please note these are subject to change and are only a rough guide. For a more accurate postage estimate please use the Postage Calculator at the basket.
UK 3-5 day Standard
£6.95
From
1-2 Working Day Dispatch UK mainland
£9.95
From
Highlands / Islands
£24.99*
From
* Please note that Scottish Highlands, and Islands postage prices can vary wildly. Please refer to the Postage Calculator at the basket for the lowest possible price.
Returns
We want you to be absolutely happy with our products and services, so we provide the simple Patrol Base guarantee: if on receiving your item you are unhappy with your item for any reason then simply send it back to us. We will replace or refund the item.
You can return any item for any reason whatsoever, even if you have just changed your mind, within 14 days of receipt of the order. This is in addition to your rights under the Consumer Protection (Distance Selling) Regulations 2000.
For more information on returning products, and how to do it please visit our Returns Policy Page.
Description
Features
- CNC Aluminium construction
- 20mm Picatinny top rail - Ready for 20mm accessories
- Authentic Zco style - Maximum realism
- Compatible with most VFC/LCT build-style AK AEG & GBBRs
- Requires a 5KU Zco Lower Handguard for fitment
- NOT compatible with AKS-74U replicas
Package Includes
- 5KU Zco Style B-31L Gas tube cover for AK-74/AK-105
Specification
General
Parts & Accessories Type | External Parts |
|---|---|
External Part Type | Upper Handguard |
Package Includes | Upper Handguard |
 | |
Construction
 | Black |
|---|---|
 | Aluminium |
Weight and Dimension
Product Length | Approx.20cm |
|---|---|
 | Approx.0.12KG |
Part Specific
 | 20mm RIS / RAS |
|---|---|
 | AK |
 | Assault Rifle |