VFC AK74M (AV74M) Buffer/Fire Rate BoosterModular Short Stroke Buffer for the VFC AK74M VFC AV74M GBBR. Increases rate of fire (ROF) by up to 40% depending on configuration when compared to VFC's long stroke configuration, and up to 24% when compared to using VFC's short stroke buffer extension. Also, this should be more durable than VFC's material, as seen in the comparison picture of a Black Variable clone of the VFC Short Stroke Extension vs the one that is included with the VFC AK74. This