Police have arrested the commander of the Comanchero bikie club Milperra chapter for his role in a bomb plot.


More than 130 police on Tuesday morning raided 10 properties across Sydney, including the Comanchero's Milperra club house, where they arrested eight members on a range of drug and gun supply charges.


Deputy Commissioner Cath Burns said Jack Dippizio, the head of the Milperra chapter, was one of those arrested.


"We will allege (he) participated in and used an explosive that was going to be used in a bombing," she said.


Ms Burn said the foiled bomb plot at Milperra Hotel last July had the potential to cause serious loss of life and injury.


Another Comanchero member, Samy Duong, is currently before the court for the bomb plot that failed to detonate.


A large quantity of cocaine, methamphetamine and cash was also seized in the early morning raids along with a number of high powered fire arms, she said.


Acting Gangs Squad Commander Gavin Wood said the investigations are continuing.


"We're not dealing with boy scouts. we're dealing with serious organised crime figures," he said.


The eight men are expected to be charged and face court later on Tuesday.