The PIP for the M4 was a far-reaching initiative to upgrade the Army's entire current inventory of M4 rifles into higher-tech, durable, and more lethal M4A1 weapons. Brooks Carroll shoots an M4A1 Carbine semi automatic rifle during a competition at Fort Carson, Colorado. Over the years, the Army has made more than 90 performance "Engineering Change Proposals" to the M4 Carbine since its introduction. Shaina JupiterFor many years, the Army upgraded and improved its M4, with some plans never passing the conceptual phase. These previous considerations, which were performed under a program called the M4A1+ effort, were analyzed by Army developers and then shelved.

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Persons: —, Brooks Carroll, Woodlyne Escarne, Maven, Juan B, Joel Manzano, 19FortyFive Organizations: Service, Business, Army, Refining, M4, Fort Carson , Colorado . US, 19FortyFive, Camp Santiago, Training, US Army National Guard, Spc, US Marine Corps Locations: Fort Carson , Colorado, Salinas , Puerto Rico, Sukabumi, West Java, Indonesia