Vickers and Armstrong as one-stop arms suppliers

How widely were Vickers guns used, and which companies competed with Vickers?

Armstrong was the principal rival before the firms combined; both could sell complete military systems rather than only individual guns.

Vickers and Armstrong were the principal international competitors before their merger. Each could supply a ship's guns, machinery, metalwork, and hull as part of one package. Their catalogues also extended across land equipment, vehicles, small arms, and even uniforms, making them one-stop suppliers for an armed force. Vertical and horizontal integration supported long contracts and complete systems rather than narrow specialist production. The comparison explains how a customer could once buy an unusually large share of its military establishment through one industrial firm.