 The absence of any small, easily fouled gas ports makes the LAR Grizzly capable of firing cast lead bullets reliably.The Grizzly utilises a standard 1911 Commander length barrel bushing to accommodate the greater excursion of the slide and associated swing of the barrel required to feed and eject the long .45 WM cartridge.In spite of this, the bushing tends to develop skirt cracks after hundreds of rounds of full-power loads.