Airbag cushion assemblies for aspirating ambient air and related assemblies, methods, and components. Some embodiments may comprise an aspirating airbag cushion assembly comprising an airbag cushion housing, an aspiration housing coupled to the airbag cushion housing and comprising an aspiration inlet configured to allow for receipt of ambient air into an airbag cushion, and an inflation module slidably coupled to the aspiration housing. The inflation module may comprise an inflator and one or more inflation tubes or other conduits fluidly coupled with the inflator and configured to deliver inflation gas from the inflator into the airbag cushion.