done through roof hatches giving partial protection. The system can act in a secondary anti-vehicle role, as the 30 mm cannon is larger than the 25 mm gun mounted on the M2 Bradley and the Hellfire has greater range than TOW missiles typically used by ground vehicles. MADIS In September 2020, the US Marines contracted Kongsberg to qualify the XM914 RWS on the JLTV, equipped with an XM914E1 30 mm cannon, 7.62 mm coaxial machinegun, and Stinger missiles to fulfill an air defense role. The Marine Air Defense Integrated System (MADIS) fills the gap left by the retirement of the AN/TWQ-1 Avenger by the USMC in the mid-2000s. It consists of two JLTVs, one with the turret fitted with a 30 mm cannon, 4-round Stinger pod, and an optical sensor and the other with an RPS-42 360-degree radar, 7.62 mm M134 minigun, and EO/IR sensors; both have the Modi II dismounted electronic countermeasures system and shoulder-fired Stingers. The indefinite delivery / indefinite quantity (IDIQ) contract was signed in October 2021. Aircraft use Boeing AH-64 Apache AgustaWestland Apache Sikorsky MH-60L Direct Action Penetrator (DAP) CASA/IPTN CN-235 See also M242 Bushmaster 25mm chain gun Bushmaster II 30mm chain gun Bushmaster III 35/50mm chain gun Bushmaster IV 40mm chain gun References Notes Bibliography External links Northrop Grumman M230 Chain Gun Factsheet Northrop Grumman M230LF Chain Gun Factsheet GlobalSecurity.org m230 Automatic Gun M230 Automatic Gun at FAS.org 30 mm artillery Autocannon Aircraft guns Alliant Techsystems Military equipment introduced in the 1980s