ACZ ULTRA Air Arms S400/500 Custom Stock


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Ultra FT – Ultimate
The Field Target version has a wooden Ultimate Palm rest (Hamster) that slides along the length of bottom stock section using a UIT rail, and that can be adjusted in height and tilt. The rear butt is fully adjustable, and can even be tilted to act as a butt hook. Comes with fitting screw, instructions and tools.

Will fit S400, 410,500,510 including HFT500. (NOT Twin cylinder models) – NB: New S510R has slight difference – contact us before buying to confirm correct part sent.

  • The ACZ Ultra is a fully adjustable stock designed to improve your shooting.
  • The stock is made from high strength Duralumin AW7070.
  • The FT stock weighs in at a little under 2000 g (with the additional weight bar it weighs up to 2.3 kg).
  • It is finished in a hard black anodized coating with a thickness of 50 microns.
  • The stocks are installed easily
  • The cheek piece, pistol grip and palm rest are made of wood, available in several finishes – Black lacquer, Beech, Red and Black/Grey Laminate.
  • Fully adjustable for length of pull (10 cm), butt angle. cheek piece height
  • Fully adjustable Utlimate hamster
  • UIT accessory rail

Weight Bar is available as optional extra.


Black, Laminate

Handed Grip