The 7.62×37mm Musang[a] is an assault rifle cartridge introduced in 2012 developed and manufactured in the Philippines by the Government Arsenal for use by the military in special operations and close quarter battle.

It was intended to offer improved lethality over 9mm and 5.56mm rounds in subsonic loads for use in CQB and suppressed weapons with a range of 300 meters.

[2][3] The Musang is a "Wildcat cartridge" inspired by the .300 Whisper concept and made from components already produced or procured by the Government Arsenal.

[4] The cartridge can be loaded for either subsonic or supersonic muzzle velocities.

The cartridge is used on the Government Arsenal's 10-inch barreled Musang PDW, which is based on the M4/M16 platform.