A Mount Pritchard woman, 47 and a St Johns Park woman, 60, were among three charged with knowingly deal with the proceeds of crime.

Firearms and Regulated Industries Crime Squad detectives searched seven houses in Sydney's west in April, including those in Fairfield and Bringelly.

Police allege they found more than $6 million, three rifles, a pistol and silencer, ammunition, mace and jewellery.

All three women were bailed and the Mount Pritchard woman will face Liverpool Court on September 5, the St Johns Park woman and a Bringelly woman, 34, will appear at Fairfield Court on September 3 and 9 respectively.