<Tr> <Td> DHC - 6 Twin Otter </Td> <Td> </Td> <Td> Canada </Td> <Td> Utility STOL aircraft </Td> <Td> UV - 18A </Td> <Td> 6 </Td> <Td> </Td> </Tr> <Tr> <Th_colspan="7"> Unmanned aerial vehicles (UAVs) </Th> </Tr> <Tr> <Td> AeroVironment Switchblade </Td> <Td> </Td> <Td> </Td> <Td> Attack UAV </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> RQ - 11B Raven </Td> <Td> </Td> <Td> </Td> <Td> Hand - launched UAV </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr>

What type of gun does our military use