Men fled from a house as police raided it and uncovered a cannabis farm, drugs and guns inside.
Officers put the door in at a home on Albany Road, in Walton, on Friday morning after member of the community reported a cannabis farm was being grown there.
As police entered the house, two men inside tried to flee officers and get away from the scene.
A 53-year-old man was caught in the back garden of the house and a 32-year-old man was caught later on the Loop Line.
Inside the house police found a cannabis farm with around 40 plants and a quantity of dried cannabis.
They also discovered a white powder and multiple guns.
In a statement, a spokesperson for Merseyside Police said: "Op Target patrols descended on the Walton area where they seized a revolver and ammunition amongst other things.
"Yesterday (17 th December), teams came together to conduct a warrant on an address on Albany Road following intelligence suggesting a cannabis farm was being grown at the location.
"They forced entry into the property as one person attempted to escape from the back of the property. Luckily officers were already waiting to catch him.
"The 53 year old man was detained and taken back inside the property whilst a 32 year old man managed to make off but was eventually caught on the Loop Line.
"Officers found a cannabis farm comprising of around 40 plants, a quantity of dried cannabis, white powder, one live firearm; an Ekol Arda 4mm Flobert and associated bullets as well as a blank firer and other rounds of ammunition.
"Both men were arrested on suspicion of drugs and firearms offences and taken to custody where they currently remain."
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Inspector Geoff Stewart said “There is no doubt in my mind that regardless of whether a weapon is live or not, they are used to cause fear in our communities.
"The recovery of this live firearm means we have potentially saved a life and prevented further acts of serious violence.”
Report your concerns to us @MerPolCC or by calling @CrimestoppersUK anonymously.