A HOMEMADE, fully-automatic machine gun has been seized from an outlaw motorcycle gang clubhouse in Perth's southern suburbs as part of a national crackdown on illegal weapons

The Gang Crime Squad searched the Rock Machine clubhouse in Myaree where it will be alleged they found an illegally manufactured sub-machine gun with two rounds of ammunition.

Inspector Dale Davies said the raid was part of the two-week nationwide Operation Unification.

On May 27 Police revealed they had seized 27 firearms and thousands of rounds of ammunition following a search of four properties the week before.

"This is a good example of the type of illicit firearms we are trying to remove from the hands of organised criminals," he said.

Insp Davies said the gun was capable of firing 15 rounds of 9mm bullets within seconds.

“The firearm was located on a mezzanine floor located in the clubhouse in Thurso Road, Myaree, it was in a black bag and there were two rounds in the magazine in the firearm itself,” he said.

“Enquiries will be continuing to find out who made the firearm and who was actually in possession of it in the club house.”

In separate searches as part of Operation Unification, officers this morning seized a Ruger 7mm Bolt Repeater rifle and 800 rounds of ammunition from a home in Waikiki, all unsecured.

A 57-year-old man has been charged over the discovery.

And yesterday afternoon Merredin police charged a 65-year-old man from Burracoppin with aggravated possession of an altered firearm and failure to secure a firearm and ammunition after he was allegedly found in possession of a loaded, sawn off .22 gun with four rounds in the magazine in his bedroom.

A further search of his house also allegedly uncovered 162 rounds of unsecured ammunition.

Insp Davies said police were finding homemade weapons more often.

“We are finding more of these weapons which is obviously of great concern to us,” he said.

“The fact that plans are accessible on the internet and people are taking the opportunity to make those firearms is of great concern, and that’s part of what Operation Unification is about.”

The two-week operation concluded today but police said anyone with any information about illegal weapons should phone Crime Stoppers on 1800 333 000.