CETME C2

Lore & Background

The CETME C2 originated from a late-1950s need to replace the obsolete Star Z-45 submachine gun, which had been designed during World War II. The first prototype, named the Calzada Bayo-61 after lead designer Joaquin de la Calzada de Bayo, was developed in the early 1960s. It was based on the Sterling L2A3 but featured a vertical feed instead of the horizontal feed later seen on the C2 and Sterling. Over the next few years, the design was refined into the CB-64. The CB-64 was initially chambered for the Spanish 9×23mm Largo round, with export versions later offered in 9×19mm Parabellum. When adopted for Spain's arsenal, it received the designation CETME C2 under CETME's coding system.

The C2's design closely resembles the Sterling SMG, though no parts are interchangeable. The receiver has a crackle paint finish similar to that of the Sterling and the Star Z-62. It features an underfolding stock that locks to the receiver via the butt-plate when not in use. The firearm has three firing modes: Seguro (safe), Tiro (semi-automatic), and Ráfaga (full auto). The bolt is helically grooved and incorporates multiple safety features: a non-fixed firing pin activated by a lever inside the bolt that only protrudes when the bolt is in battery; a non-reciprocating charging handle that allows a bolt lock to prevent accidental forward movement; and a wedge in the trigger assembly that interferes with the bolt if the bolt lock is not engaged, which can be hidden by pressing or holding the trigger. The magazine well is not fully perpendicular to the receiver.

Reader's Guide

The CETME C2 was produced in limited numbers, as Spain had already ordered submachine guns from Star. Production ceased in the 1970s, with the C2 being replaced primarily by the third-generation Heckler & Koch MP5 and the Star Z-84. Despite its limited production run, a small number of CETME C2s remain in second-line service with the Spanish armed forces. The C2 is notable for its extensive safety features, including a non-fixed firing pin, a bolt lock, and a trigger wedge mechanism, all designed to prevent accidental discharges. Its design heritage from the Sterling L2A3 is evident, but the lack of parts interchangeability and the unique safety systems mark it as a distinct Spanish development. The C2's use of both the Spanish 9×23mm Largo and the more widely adopted 9×19mm Parabellum reflects its intended domestic and export roles.

Did You Know?

• The CETME C2 is also designated the CB-64.
• The lead designer of the project was Joaquin de la Calzada de Bayo.
• The C2's firing pin is not fixed and is activated by a lever inside the bolt only when the bolt is in battery.
• The C2 was produced in limited numbers because Spain had already ordered submachine guns from Star.