Accessible with 26 and 28-inch barrels, the design I've has the shorter barrel. Barrels are chrome lined, which has a vented matte rib to reduce glare on leading. Equally versions have three-inch chambers for looking. The only selection for beads is one brass bead in the entrance with the rib. https://retaygordion12ga26barrel467804.blogitright.com/22234843/what-does-ifc-radikal-arms-mkx3-combo-12-gauge-semi-auto-shotgun-24-barrel-3-chamber-5-round-magazine-vortex-strikefire-ii-optic-tactical-stock-matte-black-mean