The duo, Rajat Dutta alias Hirokjyoti Deka and Raju Saikia alias Jayanta Hazarika, were nabbed from the outskirts of the city while they were taking the arms in a mini-truck.
They are suspected to be actively involved with the anti-talk faction of ULFA led by Paresh Baruah.
Police seized one M 20 rifle, an AK 47 rifle, eight bombs, ten landmines, along with 100 rounds of ammunition from them.