Three properties in Sandown on the Isle of Wight were also raided which also led to the arrest of 2 others on suspicion of money laundering.
West Midlands Regional Organised Crime Unit, with the assistance of Hampshire Constabulary, carried out a raid at Fairway Holiday Park at just before 1pm on Tuesday. This resulted in the arrest of the unnamed 29-year-old on suspicion of conspiracy to supply Class A drugs and conspiracy to supply firearms.
Further enquiries then led officers to raid a residential address in Avenue Road, which was searched. A commercial premise in High Street was also visited.
A 57-year-old man and a 41-year-old woman have been arrested on suspicion of money laundering. They were both detained at the house on Avenue Road.
All 3 remain in police custody for questioning.