Three Bren machine guns have been surrendered to police in the west during the first two weeks of the national firearms amnesty.
The amnesty lasts until 30 April
They were handed in to stations at Weston-super-Mare, Amesbury and Swindon.
A total of 120 weapons and 3,000 rounds of ammunition have so far been recovered by Avon and Somerset Police
Chief Inspector Tim House told the BBC: "We did not expect hardened criminals to hand over their weapons.
"But every gun that is handed in is one less opportunity for them to be used in a crime later on."
The amnesty lasts until 30 April.