The STK 40 AGL, formerly the CIS 40 AGL is a 40 mm automatic grenade launcher, developed in the late 1980s and produced by the Singaporean defence firm Chartered Industries of Singapore (CIS, now ST Kinetics).

The STK 50 MG, formerly known as the CIS 50MG, is a gas-operated, air-cooled, belt-fed heavy machine gun developed and manufactured by Chartered Industries of Singapore (CIS, now ST Kinetics) in the late 1980s, in response to a request by the Singaporean Defence Ministry to replace the 12.7mm Browning M2HB machine guns then in ubiquitous service with the Singapore Armed Forces.