Acting on a tip-off, a joint team of the police and CRPF nabbed the man from Noonmati village in the district this morning, a police spokesman said.
The person has been identified as Ariston Ronghang and four SBML guns, three rounds of ammunitions and some gun making tools have been recovered from his possession.
An FIR has been filed against the person and it was yet to be ascertained whether he belonged to any particular outfit, the spokesman added.