AYA is the only maker in Spain which machines its own barrels and actions. Their barrels are made from steel exclusive to AYA and used only in their own guns, giving them exceptional durability and strength.
Every AYA lock plate is in itself a work of art.
The hinge-pin is fundamental to the correct fit of the barrels and while in many lower-quality guns it is a fixed part of the action and cannot be replaced, all AYA shotguns have a removable hinge-pin, allowing a new lease of life to be given to the gun by the fitting of a new hinge-pin.
This allows for the replacement of pre-fitted firing pins without recourse to a gunsmiths specialist tools and with having to dismantle the gun.