StratAIM of the Netherlands announce their own gas valve that can be used with training grenades as well as airsoft guns from some of the well-known airsoft brands... "Today we launch the first innovation for the gas inlet valves in over 10 years. After years of using the current industry standard gas inlet valves we had many issues to counter. Everybody knows the common issue with gas valves like the special tool needed to screw the valve in and out.