Constructed of durable laser-cut laminate nylon; Open-top design with an adjustable bungee retention strap; Modular webbing on the front and back; Holds one 20-round 7.62x51 NATO(.308) mag; Attaches to MOLLE/PALS style webbing with 2 included short MALICE CLIPS; Compatible with SCAR Heavy, M-14, HK-91, FN FAL and most of 20rd 7.62 rifle magazines; Measurements: 4" x 4" x 1"