The .223/5.56mm Silencers are capable of greatly reducing muzzle blast in shorter 7-14" barrel rifles and pistols but they wont be "Quiet" Specially with the shorter K or Mini configurations They will however greatly decrease the possibility of hearing damage. Compared to an un-suppressed rifle they reduce the DBs by approximately 30 DBs. The performance is increased when used on 16" barrels and longer semi auto rifles, and further performance is seen on bolt action or single shot rifles. Call Oakland Tactical for a free consultation of your needs.