I am with Skeet on this, I know of someone with an M16A1 Assualt Rifle thats had its firing pin re-fitted, its not for the faint hearted, it weight about 5Kg and is not shoulder friendly, not to mention they have a muzzle velocity of over 2000fps, and are lethal upto 350m (thats killing distance) Thats why your SAS chums at paintball dont move, move and you are very quickly swiss cheese. Comparing paintball to a real combat situation is like saying I saw Jackie Chan playing Tekken 3, he wasnt very good. Well why dont you give him a slap and see what happens, you would quickly find that your leg bone is not alway connected to your shin bone.