The United States Marine Corps (USMC) has a long and storied history of using high-quality firearms, known for their durability and performance in combat situations. One of the most essential tools for any Marine is their sidearm, and the pistol they carry has evolved over time to meet the demands of modern warfare. So, what pistol does the Marines use? Currently, the USMC uses the Sig Sauer M18, a compact, modular handgun that was adopted as part of the U.S. military’s Modular Handgun System (MHS) program.
In this article, we’ll dive into the details of the M18, its history, features, and why it was chosen to replace older pistols used by the Marine Corps.
1. The Transition to the Sig Sauer M18
For many years, the standard sidearm for the U.S. military, including the Marine Corps, was the Beretta M9. Adopted in 1985, the M9 served as the military’s primary sidearm for more than three decades. However, as technology advanced and new requirements emerged, the military sought a more modern, modular handgun system to replace the aging M9 platform.
In 2017, the Department of Defense awarded Sig Sauer the contract to supply a new family of pistols under the Modular Handgun System (MHS) program. The result was two variants: the full-size Sig Sauer M17 and the compact Sig Sauer M18. While both the M17 and M18 are used across different branches of the U.S. military, the Marine Corps adopted the M18 in 2019 as their standard issue sidearm.
2. Why the M18?
The Sig Sauer M18 was chosen by the Marine Corps for several reasons:
- Modularity: The M18 is part of a modular system that allows for easy customization. Marines can swap out components such as the slide and grip to adjust the pistol to different hand sizes, preferences, and mission requirements. This makes it highly versatile and adaptable to various combat situations.
- Compact Size: The M18 is a compact version of the M17, making it easier to carry and handle in close-quarters combat or while conducting non-combat operations. Its smaller size compared to the M17 also makes it more suitable for Marines who need a more portable sidearm.
- 9mm Caliber: Like the M17, the M18 is chambered in 9mm, a NATO standard round. The 9mm cartridge offers a balance of stopping power, magazine capacity, and manageable recoil, which makes it suitable for both experienced shooters and those new to firearms.
- Improved Ergonomics: The M18’s design offers enhanced ergonomics, which improves handling and accuracy. The grip and trigger design are optimized for better control, which is crucial in high-stress situations.
- Durability and Reliability: The Sig Sauer M18 has undergone rigorous testing to ensure that it meets the Marine Corps’ stringent standards for reliability in harsh environments. It has proven to be highly durable, capable of withstanding extreme temperatures, dirt, mud, and other challenging conditions that Marines often face.
3. M18 Features
The Sig Sauer M18 comes with several advanced features that set it apart from older models like the M9:
- Striker-Fired System: The M18 uses a striker-fired mechanism, which is different from the hammer-fired design of the M9. This system offers a consistent trigger pull for every shot, improving accuracy and simplifying the firing mechanism.
- Safety Features: The M18 has a manual safety, as well as internal safeties, such as a striker block and disconnect safety. These safety features prevent accidental discharges, making the weapon safer to carry and operate.
- Optics-Ready Slide: The M18 is designed to accept red dot optics, allowing Marines to mount a reflex sight for improved aiming in both daytime and nighttime conditions. This feature is particularly beneficial for rapid target acquisition in combat scenarios.
- Enhanced Sights: The pistol comes equipped with SIGLITE night sights, which are tritium-based and allow for better visibility in low-light situations, an important factor in military operations.
- 15 or 17 Round Capacity: The standard M18 magazine holds 15 rounds, with an extended magazine option offering 17 rounds. This is an improvement over the M9’s 15-round magazine, providing Marines with more ammunition without sacrificing portability.
4. The M9 Beretta and Its Legacy
Before the adoption of the Sig Sauer M18, the Beretta M9 was the primary sidearm for Marines and other branches of the U.S. military for over 30 years. The M9, chambered in 9mm, was appreciated for its reliability and accuracy. It was widely used in conflicts ranging from Operation Desert Storm to the War on Terror.
However, the M9 had its limitations. It was relatively heavy, had a double-action/single-action trigger system that was more complex to master, and lacked the modularity of more modern designs. As military needs evolved, it became clear that a more adaptable, lighter, and technologically advanced pistol was required, which led to the adoption of the Sig Sauer M18.
5. Other Pistols Used by the Marines
While the M18 is now the standard sidearm for the Marine Corps, certain specialized units within the USMC may still use different pistols based on mission requirements. For example:
- M45A1 Close Quarters Battle Pistol (CQBP): This pistol, a modernized version of the classic Colt 1911, is used by the Marine Corps’ elite special operations units, including Marine Force Recon and MARSOC. The M45A1 is chambered in .45 ACP and is favored for its stopping power and reliability in close-quarters combat.
- Glock 19: Some specialized units within the Marines, as well as other branches of the military, use the Glock 19 for its compact size, simplicity, and widespread availability of parts and accessories.
6. The Future of Marine Corps Sidearms
As technology advances, the USMC is likely to continue evaluating and potentially adopting new pistol designs to keep up with evolving combat needs. However, for now, the Sig Sauer M18 represents the cutting edge of sidearm technology for the Marine Corps, providing a versatile, reliable, and modern solution for Marines on the battlefield.
Conclusion
The Sig Sauer M18 is the current standard issue pistol for the United States Marine Corps, replacing the Beretta M9 after decades of service. With its compact design, modularity, and advanced features, the M18 offers Marines a highly capable sidearm suited to a wide range of combat and non-combat situations. Its selection underscores the Marine Corps’ commitment to equipping its forces with the most reliable and effective weapons available.
While the M18 is the primary sidearm, the Marine Corps still utilizes other pistols in specialized roles, including the M45A1 and the Glock 19. The transition to the M18 marks a significant step forward in the evolution of Marine Corps sidearms, ensuring that Marines are prepared for the challenges of modern warfare.
