Gun silencer on a Brno M 581 Semi Automatic cal. 22 lr, rifle. Shooting with sound suppressor to demonstrate the efficiency of a silencer for rifles, pistols and airsoft guns. Introduction of Gun Silencer Manual avaiabla from www.rifflar.com , a pdf book of, how to make a gun silencer, for rifles,pistols and airsoft guns. Easy and simple to make, homemade professional silencer. Gun silencer manual, of making silencer, from BRS Custom Rifles. Available at http://www.rifflar.com/silencer.html Less