Introduction: The M9 Bayonet is a combat knife and bayonet that has served as a vital tool for military personnel and tactical operators around the world. Adopted by the United States Armed Forces in 1984, the M9 Bayonet has a rich history and remains in active use today. This article delves into the features, development, and applications of this iconic blade.

1. Origins and Development: The  Bayonet  traces its origins to the Phrobis III bayonet, which was developed in the late 1970s as part of the United States Army’s effort to replace the M7 bayonet. The Phrobis III bayonet underwent several design iterations, with feedback from military personnel and input from renowned knife designer Colonel Rex Applegate. Eventually, the final design was adopted as the M9 Bayonet.
2. Design and Features: The M9 Bayonet features a 7-inch (18 cm) clip-point blade made of high carbon stainless steel. It has a black oxide finish for corrosion resistance and reduced reflection. The blade is sharpened on one side and has a serrated section near the handle for increased utility. The bayonet also includes a crossguard and a pommel, which can be used as a hammer or for other tasks. The handle is made of textured polymer, providing a secure grip even in wet conditions.
3. Attachment and Deployment: The M9 Bayonet is designed to attach to the M16 family of rifles, as well as other compatible firearms with the appropriate mounting hardware. It features a mounting mechanism that allows for quick and secure attachment to the rifle’s bayonet lug. The bayonet can be quickly deployed by pressing a release button, allowing it to serve as a close-quarters combat knife or as a bayonet for rifle engagement.
4. Versatility and Applications: The M9 Bayonet offers a wide range of applications, making it a versatile tool for military and tactical personnel. It serves as an effective combat knife, allowing soldiers to perform various cutting and slashing tasks. The serrated section near the handle is particularly useful for cutting through rope, webbing, or other tough materials. In addition, the bayonet attachment allows for rifle engagements, enhancing the soldier’s close-quarters combat capabilities.
5. Continued Use and Modifications: Since its adoption, the M9 Bayonet has undergone minor modifications to improve its functionality. Some variants feature a sawback design on the spine of the blade, further enhancing its utility in survival situations. Additionally, accessory kits are available, providing sharpening stones and other maintenance tools to keep the bayonet in optimal condition.

Conclusion: The M9 Bayonet remains an essential tool for military personnel and tactical operators, offering a combination of utility and combat effectiveness. Its design, versatility, and rugged construction have made it a trusted companion in the field. With a rich history and ongoing use, the M9 Bayonet continues to be a symbol of military might and readiness.