KAC M203 is a single shot 40mm grenade launcher widely used amongst US combat units. For modern infantry warfare, grenade launchers are great demand for their effectiveness in launching high explosive rounds, smoke, signaling rounds or illuminationg flares. KAC has contributed to this capability by developing its Quick Detach/Attach (QD) Latch Assembly as part of the Government's Modular Weapon System (MWS)

When coupled with KAC quick detach mounts, KAC m203 40mm grenade launchers can be mounted onto AR-15 rifles for additional firepower, as well as deployed as a standalone with KAC standalone modules. There are currently two barrel lengths available - 9" and 12"