(Portland, OR)  --  Police say a record number of illegal guns were seized late last month as part of a drug and firearms investigation.  The Multnomah County Sheriff's Office served a warrant on a house in Clackamas County on July 29th and recovered 337 guns.  They included machine guns, thousands of rounds of ammunition and high capacity magazines.  Deputies also located methamphetamine.  This follows an investigation in June where 44 guns were seized from a home in Gresham.  Arrests and charges are expected from the raid in Clackamas County.