Faridkot Police arrested four people with 47.3 kg of heroin and three pistols.
The arrests were made at a special checkpoint.
Police said the network used drones to receive consignments from across the border.
Fifteen cartridges and two vehicles were seized.
The investigation is continuing.
The gang then supplied the consignments further within Punjab, police said.
An FIR has been registered at Sadiq police station in Faridkot.
Investigators are working to establish the forward and backward linkages of the network.
Punjab, which shares a long border with Pakistan, has seen repeated drone-dropped drug and weapon consignments in border districts.
Police recoveries of this kind are typically followed by questioning of the accused to trace the suppliers across the border and the buyers within the state.
The accused are yet to be tried, and the allegations against them remain to be proved in court.
The recovery included both narcotics and firearms, which police say shows the gang handled more than one kind of illegal consignment.
Baba Farid Agman Purab is a major annual religious event in Faridkot, and police step up checking in the district ahead of it.
Ferozepur and Fazilka, the districts named in the case, lie on the border with Pakistan.
Crime Investigation Agency units in Punjab districts focus on organised crime and narcotics cases.
The Faridkot Police arrested four operatives of a cross-border smuggling network and seized 47.3 kg of heroin.
They also recovered three pistols, three magazines, 15 cartridges and two vehicles.
A team from the Crime Investigation Agency (CIA) in Faridkot intercepted a Honda City car on the night between Saturday and Sunday during a special checkpoint.
The checkpoint was set up ahead of the forthcoming Baba Farid Agman Purab.
The four occupants of the car were apprehended, and the heroin and weapons were found during the search.
Raj Mahal palace, Faridkot (representative image), Wikimedia Commons, public domain
