<Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2007) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2007) (Learn how and when to remove this template message) </Td> </Tr> <P> Rate of fire is the frequency at which a specific weapon can fire or launch its projectiles . It is usually measured in rounds per minute (RPM or round / min), or rounds per second (RPS or round / s). </P> <P> Several different measurements are used . The fastest and most commonly quoted rate is the cyclical rate of fire . However, heat (possibly leading to weapon failure) and exhaustion of ammunition mean most automatic weapons are unlikely to sustain their cyclic rate of fire for a full minute . That is why lower rates apply in practice and it is incorrect to describe the cyclic rate of fire as "the number of rounds a weapon can fire in one minute ." </P>

What is the cyclic rate of fire of an ar 15