FMTV Vehicle 4 x4 Truck M1080 or M1080A1 2 1/2 Ton Stewart & Stevenson's Tactical Vehicle Systems SEAT. Part # 12422731. Fits Lower seat assembly complete with sliding frame to adjust back and forward movement. Fits Driver's Side Bottom. NSN# 2540014949713. New. Mounting type: track w/track and hole. Adjustable mounting via horizontal. Seat cover is polyester/nylon fabric. Contour cushions are tapered from 32 to 60mm. Seat adjusts 150mm from front to rear position.