Pakistan army, in a joint operation with the paramilitary Frontier Corps, seized the weapons from a cave-like-tunnel in Bara tehsil of Khyber Agency.
Security officials claimed that the weapons were hidden "skilfully" inside the tunnel.
They claimed that the weapons included anti-aircraft guns, Bazooka guns, heavy machine guns, Russian launchers, sub-machine guns, and also Indian-made Vikras automatic guns.
Gas masks, shell-proof jackets, wireless sets, telescopes and hand grenades were also found along with the weapons.
In the volatile northern region, Pakistan Army has launched major operations to clear the areas of militants.
Commanding Officer Khyber Agency said that Operation Khyber-2 has almost ended and recovery and cleaning operations are going on now.