Officers searched a red Audi in Paignton, Devon, at 4.45pm on Monday and found the weapons stuffed into a holdall.
It is thought the weapons may have been imported from mainland Europe to be sold on the black market in the UK.
The weapons, which are illegal to own, were disguised as silver mobile handsets which would enable criminals to carry them.
They emit a potentially lethal charge from the top of the mobile phone, which is activated by pressing the keypad.
Devon and Cornwall police yesterday said they were testing the haul of weapons to make sure they are genuine and to see how powerful they are.
A small amount of cannabis was also found.
A 44-year-old man and a 17-year-old girl, both from Paignton, were arrested at the scene.
The teenager was later released without charge and the man released on police bail until August 10.
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Edited by Killicksparker, 08 June 2011 - 07:21 AM.