 The Danao City makers manufacture .38 and .45 caliber revolvers, and semi-automatic copies of the Ingram MAC-10 and Intratec TEC-DC9.In 2004, an "underground weapons factory" was seized in Melbourne, Australia, yielding among other things a number of silenced copies of the Owen submachine gun, suspected to have been built for sale to local gangs involved in the illegal drug trade.Improvised firearms have also been used in Russia, where they have been used in domestic homicides and terrorism.