Military grade fully automatic firearms have been found in Melbourne west homes as police make arrests over a series of armed robberies.

The M16 and M4 rifles were seized during raids on 10 properties on Tuesday morning in Point Cook, Wyndham Vale, Tarneit and Werribee.

A woman is led away by Armed Crime Taskforce Detective Inspector Steve Clark after a raid in Point Cook. Credit:Tammy Mills

Eleven people, most of them in their 20s, were arrested over alleged connections to three armed robberies and one attempted armed robbery.

This included the hold-up and shooting of a woman at a Sunshine West factory in October, the robbery of a cafe the same day and an armed robbery of a Sunbury McDonald's and attempted robbery of a Keilor West McDonald's on December 1.