Police have arrested almost 160 people as part of a national crackdown on motorcycle gangs.

A country-wide operation, dubbed Taskforce Morpheus, featured more than 2000 officers homing in on bikie gangs for a week ending Sunday.

They ultimately laid almost 700 charges and seized 43 firearms, along with more than 20 other weapons, 11 vehicles and about $1 million in cash during the

Officers also seized various quantities of different drugs during more than 70 raids across the country.

They executed more than 250 firearm prohibition order compliance searches and served another 15 people with the orders.