One interesting tidbit that Caylen covered yesterday was bipods. Sometimes you may find your bipod is to high for the shot you need to make. And, sometimes bipods can produce erratic accuracy. Both can be solved with a good knife.
By digging out under the bipod legs you can lower the height of the rilfe. (Lower is always better as long as you have complete access to the rifle – magazine / floor plate.) Digging out some dirt also softens the dirt so that the bipod legs are not resting on a hard surface. Always strive for soft on hard or hard on soft contact.
This is of course a good reason to carry a knife with a big / robust blade. You don’t want to dig in the ground with your skinning knife.