- Convert to Silent Fill
- High Quality O-Rings
- Rebuilds Gas Mags/Grenades
A set of O-Rings designed to either replace your old magazine / grenade (MOSCART) seals, or make them silent fill.
Here at Patrol Base we ship all around world, with delivery not only to the UK, but to most of the EU and select Worldwide locations as well. We provide a working day by road service via our handpicked courier services, simply buy your Airsoft guns with us and we'll have them delivered directly to your door.
For more information and to see the country we deliver please check out our Delivery Information Page.
Below are some rough postage prices for orders. Please note these are subject to change, and are only a rough guide. For more accurate postage estimate please use the Postage Calculator at the basket.
UK Next Day
Highlands / Islands
* Please note that Scottish Highlands, Islands and EU post prices can vary wildly. Prices range from £8.99, up to £29.99, so please ensure you refer to the Postage Calculator at the basket for the lowest possible price.
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.
In addition to replacing the internal fill valve O-ring these can also be used to make most fill valves silent fill meaning you will no longer waste gas each time you fill a magazine. Fits most fill valves including KSC & KWA, Maruzen, WE etc. These can not be used to make King Arms MOSCART fill valves silent fill but will fit inside the valves. These do not fit inside some/most Tokyo Marui fill valves but can be used to make them silent fill. Replacing your existing seals with these can help with leaking fill valves, or help prevent gas leaking around the fill valve when the magazine is full.
- For Gas magazines / grenades, excluding Kings Arms MOSCART / Tokyo Mauri fill valves
- High quality O-Rings
- Convert to Silent Fill
- Rebuilds a huge array of gas magazine / grenade
- 12 x Internal Fill Valve / Silent Fill Valve O-Rings
Parts & Accessories Type
Maintenance, Magazine Part,