XM-148: Colt's Vietnam Grenade Launcher
This video explores the Colt XM-148, a 40mm under-barrel grenade launcher developed for the M16 rifle during the Vietnam War. Originating from the Special Purpose Infantry Weapon (SPIW) program's need for area-effect capabilities, the XM-148 was a promising Colt CGL-4 design. Despite an initial order of 10,500 units in 1966, field reports led to its removal from combat use in 1967, being replaced by the M79 and later the M203. The video highlights the development and shortcomings of this grenade launcher.














