Now available is a quick attach hand guard extension for the QCB!! This is great for use with a longer barrel as it not only protects the shooters hand from a hot barrel but also lends a more complete symmetry to the QCB when using a longer barrel. Just insert and twist and the Hand Guard Extension locks into place. It's that simple !!! The Hand Guard Extension works with both the standard version of the QCB as well as the Long railed version. All other aspects of the QCB remain the same. Call today to make your QCB complete when using longer length barrels in your QCB.