A military-grade machine gun was among the items seized during the search of an Oakridge Crescent home in Abbotsford on Tuesday night.
Abbotsford Police Const. Ian MacDonald said a 56-year-old man and a 42-year-old woman were arrested.
Members of the drug squad and the Municipal Integrated Emergency Response Team executed a search warrant at about 8:45 p.m. at the home in the 2100 block of Oakridge Crescent.
In addition to the machine gun, police found a magazine with ammunition for that weapon, a rifle, 200 rounds of various ammunition, a Taser, and small quantities of crystal meth and heroin.
MacDonald said police faced a challenge during their search.
"A pit bull, several times, was lunging at them," he said.
The home and the two arrested are well-known to police, MacDonald added. In November 2010, police fatally shot a bull dog that lunged at them while they were questioning two people on the property. One of the officers first clubbed the dog, but it didn't back off.
In June 2009, a 31-year-old man in the home suffered a gunshot wound and stab wounds after an altercation with two other men.
Four people were in the home at the time of the search on Tuesday, but only two were arrested. Gordon Douglas Stark was charged with careless use of a firearm, possessing a prohibited weapon and unauthorized possession of a firearm. He next appears in Abbotsford provincial court on March 29.
Charges are still pending against the female suspect.
MacDonald said the pair are not believed to have any gang affiliations.