

- 20rnd Capacity
- Short mag with steel shell
- Ideal for Vietnam builds & DMRs
Whether you're working on a GBBR DMR or you're running a historically accurate Vietnam primary, the CYMA 20rnd Green Gas VN Magazine for MWS/CGS GBBRs belongs in your rig! Made with a steel shell and polymer internals, this mag is far shorter than the standard AR mag, meaning you can keep your primary compact and get lower in the prone position.
Designed for CYMA's CGS GBBRs but also compatible with TM ZET System M4/AR-15 GBBRs, this short mag replicates the early issue 20-round M16 magazine first used in the Vietnam War but also found paired with MK12 SPR rifles in more recent history.
The fill valve is on the rear of the magazine body and must be facing upwards to fill with gas. Loading is carried out through the feed lips on the top. We recommend a speed loader with a GBB adapter to load this mag, as the spring is quite stiff.
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
- 20rnd Capacity
- Short mag with steel shell - Realistic build
- Green Gas Magazine - Takes standard Red/green/summer gas
- Fill valve on the rear - Fill with the valve facing up
- Loaded through the feed lips - Speed loader with GBB adapter recommended
- Compatible with CYMA CGS M4/AR-15 GBBRs - Should also fit TM MWS ZET System M4/AR-15
- Ideal for Vietnam builds & DMRs
Package Includes
- CYMA 20rnd Green Gas VN Magazine for MWS/CGS GBBRs
Specification
General
Parts & Accessories Type | Magazine |
|---|---|
Item Colour | Black |
Construction | Steel shell with polymer internals and steel feed spring. Brass valves. Rubber gas route bucking & O-rings |
Weight (KG) | Approx.0.3KG |
Magazine Specific
Magazine Style | M4 / AR Platform |
|---|---|
Platform Type | Assault Rifle |
Platform | M4 / AR-15 / M16 |
Magazine Type |
|
Magazine BB Capacity | Approx.20Rounds |
Warnings | Lubrication is required |
|---|




