Collars are provided to facilitate retaining the blades of a broadhead in their in-flight position during flight. Collars can be used in situations where the preexisting use of an O-ring is used to help facilitate maintaining he blades of a broadhead in their in-flight position during flight. Collars can also be used in situations where the preexisting use of an O-ring is not used to help facilitate maintaining he blades of a broadhead in their in-flight position during flight.