A modern friction buffer stop on a 4 m stub of ballasted track: a sliding shoe clamped over each railhead, an impact head with a hydraulic buffer above it, a braced crossbeam between them and a red and white target panel with a lamp on a short post. Ballast base at y=0, concrete sleeper tops at y=0.41 and railhead top at y=0.60; 1,435 mm gauge with rail centres at x = +/- 0.7525. The module origin sits on the rail-a port at the track centreline and the module runs toward +Z on the 6 m grid. Bounding size 4.40 x 3.14 x 4.00 m (X x Y x Z). Metre units, +Y up, +Z forward, resting at y=0. Static geometry; no rig, collision or navigation data.