The N° 4 has been AYA’s standard boxlock design since 1960. It is modelled on a Westley Richards boxlock action, brought to Spain by the King brothers. The Anson & Deeley action, the most famous of all boxlock designs, was created by two employees of Westley Richards in 1875, and ever since, Westley Richards guns have defined boxlock elegance.
The Nº 4 is mechanically very simple, which makes it durable, dependable, and easy to service. It employs a Purdey double underbolt locking system.