Viper security belt is a 2" duty
belt that comes with a 3 point quick release plastic buckle. Velcro
adjusting, it fits up to 42" waist. All at a reasonable
price.

The buckle is fitted with a three point release,
requiring 2 fingers and a thumb to release it. This prevents a situation you get
with 2 point releases where people stood to your front can undo your
belt.

This belt is not particularly stiff. If you are carrying a lot of
belt kit, it may be worth upgrading to a PWL or Protec belt.