Seven people have been arrested as part of an investigation into drugs and money laundering.
Avon and Somerset Police said warrants were executed at properties in north Bristol, Gloucestershire and Wiltshire.
Officers seized cannabis, suspected cocaine and cutting agents, large amounts of cash and several rounds of live ammunition.
Four men arrested on suspicion of conspiracy to supply Class A drugs have been released on police bail.
A woman and two men were arrested on suspicion of money laundering and have also been bailed, pending further inquiries.