Lees Precision Engineering Internal Fill Valve/Silent Fill Valve O-Rings (Pack 12)

Lees Precision Engineering
Code: FVK-001
  • 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.

Full description


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

Package Includes:

  • 12 x Internal Fill Valve / Silent Fill Valve O-Rings



Parts & Accessories Type
Maintenance, Magazine Part,
Over 18 Only Icon
Over 18


Colour Wheel Greyscale
Item Colour
Material Icon