By 2557 the MA5D had become standard issue. It saw continued use throughout the war, though the MA5's B and C variants remained more common. The MA5D ICWS was in limited service use as early as 2525 when it was issued to officer cadets, drill instructors, and security personnel at the Corbulo Academy of Military Science, as well as Spartan Blue Team. The 2525 model bears few noticeable design differences from the MA5C apart from an integrated muzzle brake, and the overall bulkiness of the newer rifle. It possesses a built-in ammunition indicator and magnetic compass for orientation similar to that of all other MA5 series rifles. The MA5D assault rifle is an air-cooled, gas-operated, magazine-fed, fully automatic bullpup rifle that fires standard 7.62×51mm FMJ-AP ammunition from a 32- or 36-round detachable box magazine. 3.7 Changes from HCS testing to Overtime.3.6 Changes from Halo 5: Guardians to HCS testing.3.5 Changes from Halo 5: Guardians Multiplayer Beta to Halo 5: Guardians.3.4 Changes from Halo 2: Anniversary to Halo 5: Guardians Multiplayer Beta.3.3 Changes from Turbo update to Halo 2: Anniversary.3.2 Changes from Halo 4 to Turbo update.3.1 Changes from MA37 ICWS in Halo: Reach.

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