Police found cannabis in gardens in Craigavon, Co Armagh, near a two-storey terraced property with children’s scooters outside.
The hedgerow had been used to stash easily-accessed supplies.
It is in the Enniskeen estate — a dilapidated area located in the centre of the borough, bordered by a large roundabout, a lake and roads.
Officers discovered a firearm in the house, a starting pistol which can fire blanks but may be modified to take a live round.
They arrested a man suspected of possession of a firearm in suspicious circumstances, possession of class B drugs and possession with intent to supply. He was taken from the property gesticulating and shouting abuse.
Officers wearing gloves groped through the edge of lawns and under hedges and used specialist equipment to lever the bags out from the soil. They also lifted paving stones and inspected gutters to check for more caches.
There was cannabis resin worth £30-50 in the garden next door and officers discovered some dealing bags which are used to place amounts for individual buyers.
Suspected cannabis resin and herbal cannabis was found in the gardens, with individually wrapped deals worth about £20 each.