Allows getting to locations that would be otherwise out of reach. Mind the weight limit.
Sometimes, an arm's reach isn't enough. For this purpose military engineers around the world, most notably Oceanykan ones, have constructed grappling hooks able to be fired from firearms. This particular model can be shot from intermediate calibre firearms, and even some sufficiently powerful pistols, though it isn't strong enough to reliable hold a fully kitted out soldier. It is still useful for tripping wires, reaching far away things, and carrying a single person with little or no gear on.