The Army's M-4 Carbine: Background and Issues for Congress

16 November 2011

The M-4 carbine is the US Army's primary individual combat weapon for infantry units. While there have been concerns raised by some about the M-4's reliability and lethality, some studies suggest the M-4 is performing well and is viewed favourably by users.

This report provides an overview of the M4 Carbine improvement programme and carbine competition, concerns with M-4 reliability and lethality, the Congressionally requested M-4 test and an examination of the small arms capability-based assessment.

The report also raises potential issues for Congress, such as M-4 performance and reliability, DOD's small arms review versus the Army's plan to replace the M-4 and USSOCOM implications of replacing M-4s.

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