A sliding guide rail system for slidably opening and closing a drawer within an article of furniture or other equipment, the system comprises a mounting bracket (10) for fixing the system to the article of furniture, a fixed guide (20) mounted on the mounting bracket, an intermediate rail (30) and a pull-out guide (40). The fixed (20) and pull-out guides (40) each have a slidably movable housing, a first slidable housing (50) enabling the intermediate rail (30) to be slidable on the fixed guide (20) and a second slidable housing (50′) enabling the pull-out guide (40) to be in turn slidable on the intermediate rail (30). Each of the fixed guide (20), intermediate rail (30) and pull-out guide (40) have stops (60) disposed thereon for limiting the sliding movement of the first (50) and second slidable housings (50′), wherein a resiliently deformable damping member (52, 52′) is located in a respective chamber (51) provided at each longitudinal end of the first and second slidable housings. The damping member (52, 52′) has a buffer portion that projects out of and beyond its chamber (51) for engaging with a stop (60) at the travel limit of the slidable housing (50, 50′), the chamber being oversized relative to the portion of the damping member disposed within the chamber whereby the chamber accommodates expansion of the damping member when it is deformed by impact with the stop.