I've been playing airsoft for nearly 2 years now. A great sport, using realistic firearms to fire 6mm plastic ball bearings - almost any sort of kit and gun are available in airsoft form. There are many sites for playing airsoft dotted around the United Kingdom, some are outdoors in woodland, or mixed terrain, others are indoors, the distance for the games varies on the site you choose to play at, some are long distance (like C3 Tactical in Monmouthshire) and others are close quarters based (like Strikeforce in Gloucester). I have taken to using my interest in military history as a source of inspiration.
WW2 British kit

WW2 German kit