CETME (Spanish: Centro de Estudios Técnicos de Materiales Especiales, lit. 'Centre for Technical Studies of Special Materials') is a Spanish government design and development establishment. While being involved in many projects CETME was mostly known for its small arms research and development. The CETME Model 58 and CETME Model L are its most notable projects. CETME also designed the CETME C2 9mm submachine gun, and the CETME Ameli light machine gun in 5.56×45mm NATO.