The Magpul UBR GEN2 stock brings fixed-stock rigidity to a collapsible package for AR-15/M4 and AR-10/SR25 platforms. Its constant cheek-weld design holds comb height steady across every length-of-pull position, and the heavy-duty construction shrugs off hard use — a favorite for suppressed and optic-heavy builds that demand a consistent, solid mount. OD Green.