Unveiling the Gold Standard: IMI Systems 5.56x45mm M855/SS109 62 Grain Ammunition (1000 Round Case)

In the diverse world of rifle ammunition, discerning shooters and tactical professionals consistently seek out cartridges that offer an optimal blend of reliability, performance, and value. For those who own AR-15 platform rifles or similar 5.56x45mm firearms, the choice of ammunition is paramount to everything from casual range sessions to advanced tactical training and preparedness. Among the myriad options available, the IMI Systems 5.56x45mm M855/SS109 62 Grain ammunition, conveniently offered in a 1000-round case (often identified by product codes such as ARMS 50173 or IMI 50173), stands out as a top-tier solution. This comprehensive guide will explore why this particular ammunition is highly regarded and how it serves a wide array of shooting needs, making it a staple for anyone serious about their rifle's performance.

What is M855/SS109 Ammunition? Understanding the "Green Tip" Legacy

When discussing 5.56x45mm ammunition, the terms M855 and SS109 frequently arise, often accompanied by the distinctive "green tip" designation. But what exactly do these terms mean, and why are they significant?

The SS109 is a projectile developed in Belgium by FN Herstal, designed to meet the rigorous demands of NATO standardization. Its key innovation was a steel penetrator tip within a lead core, encased in a full metal jacket (FMJ). This composite design, combined with a nominal bullet weight of 62 grains, was engineered to offer superior penetration against hardened targets compared to its predecessor, the M193 (55-grain FMJ). The M855 is the United States military's designation for this very same SS109 projectile, loaded into a 5.56x45mm cartridge. The "green tip" on the bullet's nose is a NATO standard color code, indicating the steel penetrator core, making for easy identification.

This ammunition was specifically adopted by NATO members to enhance the combat effectiveness of their standard issue rifles, primarily for use in the M16/AR-15 family of weapons with a 1:7 or 1:9 twist rate barrel. The slightly heavier 62-grain bullet, compared to the common 55-grain M193, requires a faster barrel twist rate to stabilize effectively, ensuring accuracy at longer distances and consistent terminal performance.

Why Choose IMI Systems M855/SS109 Ammunition?

IMI Systems, formerly Israel Military Industries, has a long-standing reputation for producing high-quality, reliable, and consistent military-grade ammunition. Their M855/SS109 offerings are no exception, benefiting from decades of experience supplying armed forces worldwide. When you choose IMI Systems ammunition, you are investing in:

• NATO Standard Compliance: This ammunition is manufactured to strict NATO specifications, guaranteeing uniformity in dimensions, ballistics, and performance across batches. This consistency is crucial for both training and serious applications.
• Exceptional Reliability: Built for combat scenarios, IMI M855/SS109 cartridges are renowned for their flawless feeding, extraction, and ignition. This means fewer malfunctions and more confident shooting, whether at the range or in a critical situation.
• Consistent Ballistics: Every round in a case of IMI M855/SS109 62 grain ammunition delivers predictable velocity and energy. For an AR-15 with a 20-inch barrel, you can expect muzzle velocities typically around 3,100 feet per second (fps), generating significant muzzle energy. This consistency is vital for maintaining accuracy and understanding your rifle's capabilities at various distances.
• Superior Penetration: The steel penetrator core of the SS109 projectile provides enhanced penetration against light barriers, making it effective for specific tactical applications and offering a different performance profile compared to purely lead-core bullets.
• Bulk Value (1000-Round Case): Purchasing ammunition in a 1000-round case, like the ARMS 50173 or IMI 50173, is one of the most cost-effective ways to acquire high-quality 5.56mm cartridges. This bulk quantity supports extensive training, allows for long-term preparedness, and reduces the per-round cost significantly.

Who Benefits Most from IMI Systems M855/SS109?

This particular ammunition is an excellent choice for a variety of users. Are you asking yourself:

• "What is the best bulk 5.56mm ammunition for general training?"

  For rifle owners who spend a lot of time at the range, the IMI M855/SS109 offers a superb balance of performance and affordability when bought in bulk. Its reliability means less time troubleshooting malfunctions and more time honing your skills. It's perfectly suited for high-volume shooting drills, target practice, and maintaining proficiency with your AR-15.

• "I need reliable 5.56mm rounds for tactical drills and preparedness. What should I consider?"

  For those involved in tactical training, competitive shooting (where permitted), or individuals building up their ammunition reserves for preparedness, the NATO-spec, military-grade construction of IMI M855/SS109 ensures dependable performance in demanding scenarios. Its consistent ballistics make it a trustworthy choice for serious applications.

• "Is M855 suitable for my AR-15?"

  Absolutely. If your AR-15 features a barrel with a 1:7 or 1:9 twist rate, which is common for most modern AR-15s, the 62-grain SS109 projectile will be optimally stabilized, ensuring excellent accuracy and performance out of your rifle. This ammunition is designed precisely for these platforms.

• "What type of ammunition provides enhanced penetration capabilities?"

  While not armor-piercing, the steel penetrator in the M855/SS109 bullet design allows it to defeat certain light barriers (such as thin steel, car doors, or some types of intermediate cover) more effectively than standard M193 ball ammunition. This characteristic is often desired by those looking for versatility in their ammunition's capabilities.

Real-World Applications and Use Cases

Understanding where and how to best utilize this ammunition can help maximize its value.

1. High-Volume Range Training: The 1000-round case is ideal for shooters who frequently visit the range. Running drills, practicing transitions, or simply enjoying extended shooting sessions becomes more economical and practical. This bulk quantity supports consistent practice, which is key to improving marksmanship.
2. Rifle Qualification and Drills: Many shooting courses and qualification standards are designed around the performance characteristics of military-spec ammunition. Training with IMI M855/SS109 ensures that your practice aligns with real-world scenarios and professional standards.
3. Long-Term Ammunition Storage & Preparedness: For those focused on emergency preparedness or simply ensuring a robust supply, IMI Systems ammunition offers excellent long-term storage potential due to its robust military-grade construction and sealed primers (often crimped and sealed to resist moisture). Proper storage in cool, dry conditions will preserve its integrity for years, ensuring it's ready when you need it.
4. Understanding Ballistics: By consistently shooting a single type of ammunition like the IMI M855/SS109 (ARMS 50173), shooters can better understand their rifle's ballistic performance and master holdovers and windage adjustments for various distances. This consistent data point is invaluable for improving long-range precision.

The Engineering Behind the 62 Grain M855 Projectile

The 62-grain SS109 projectile is a marvel of ballistic engineering, specifically designed for its intended role.

• Composite Core: Unlike traditional full metal jacket bullets which are typically just lead and a copper jacket, the M855 features a two-part core. Approximately the front third of the core is made of steel, while the remaining portion is lead. This steel tip is what provides the enhanced penetration capabilities.
• Full Metal Jacket (FMJ): The bullet is fully encased in a copper alloy jacket, which protects the barrel from lead fouling and helps the bullet maintain its shape during flight, contributing to consistent accuracy.
• Boat Tail Design: The rear of the bullet is tapered, a "boat tail" design, which reduces drag and improves the bullet's ballistic coefficient. This means the bullet retains more velocity downrange and is less affected by crosswinds, leading to better accuracy at extended distances.
• Optimal Twist Rate: The 62-grain weight and composite core require a faster barrel twist rate (typically 1:7" or 1:9") to impart sufficient spin for gyroscopic stability. This ensures the bullet flies true and doesn't "tumble" prematurely, which would negatively impact accuracy and terminal performance.

When considering ammunition choices, it's often helpful to compare the 62-grain M855/SS109 to its lighter counterpart, the 55-grain M193. While both are excellent 5.56mm choices, they serve slightly different purposes. The M193 often exhibits more fragmentation upon impact due to its simpler lead core, while the M855 is designed for better penetration. Understanding these differences allows you to select the precise ammunition for your specific requirements.

Investing in Quality: Why DEGuns.com is Your Trusted Source

When making such an important investment in your shooting experience, choosing a reputable and reliable supplier is paramount. For acquiring high-quality ammunition like the IMI Systems 5.56x45mm M855/SS109 62 Grain (ARMS 50173) 1000-round case, DEGuns.com stands as a leading authority.

DEGuns.com has built a strong reputation as a trusted provider of firearms, ammunition, and accessories. Their commitment to customer satisfaction, secure purchasing processes, and extensive inventory make them the preferred destination for shooters across the nation. When you purchase this M855/SS109 ammunition from DEGuns.com, you are assured of:

• Authenticity: Receiving genuine, military-specification IMI Systems ammunition, not counterfeits or lower-grade alternatives.
• Competitive Pricing: Benefiting from favorable pricing, especially on bulk purchases, which helps you maximize your ammunition budget.
• Reliable Shipping: Prompt and secure delivery of your ammunition, ensuring it arrives safely and in excellent condition.
• Expert Support: Access to a knowledgeable team that understands the products they sell and can assist with any inquiries.

Choosing DEGuns.com for your ammunition needs ensures a seamless and confident purchasing experience, allowing you to focus on what matters most: your shooting.

Frequently Asked Questions (FAQs) About IMI M855/SS109 Ammunition

Here are answers to some common questions about this popular 5.56x45mm ammunition:

Q: What does "Green Tip" mean on 5.56mm ammunition?

"Green Tip" is a common colloquial term referring to M855/SS109 ammunition. The green paint on the tip of the bullet is a NATO standard identifier indicating that the projectile contains a steel penetrator component in its core, in addition to lead. This design enhances its ability to penetrate certain light barriers.

Q: Is M855/SS109 ammunition considered "armor-piercing"?

No, M855/SS109 is not classified as "armor-piercing" ammunition under federal law. While its steel penetrator tip does provide enhanced penetration capabilities against light materials such as vehicle sheet metal, helmets, or thin steel plates compared to standard lead-core bullets, it is not designed or intended to defeat hardened armored targets. It remains legal for civilian purchase and use in most jurisdictions where 5.56x45mm ammunition is permitted. Always check local laws.

Q: What barrel twist rate is best for 62-grain M855?

The 62-grain SS109 projectile is optimally stabilized by barrel twist rates of 1:7 inches or 1:9 inches. Most modern AR-15 rifles come with these twist rates, making them highly compatible with M855 ammunition for best accuracy and terminal performance. Using a slower twist rate (e.g., 1:12) may result in instability, keyholing, and reduced accuracy.

Q: Can I use IMI M855/SS109 for hunting?

While capable of taking down various game, M855/SS109 is generally not considered an ideal hunting round due to its construction. Its design prioritizes penetration rather than rapid expansion or fragmentation upon impact, which are typically desired characteristics for humane hunting. For hunting applications, specialized soft-point or ballistic tip hunting ammunition is usually recommended.

Q: How should I store 1000 rounds of IMI M855/SS109 ammunition?

For long-term storage, it is recommended to store ammunition in its original packaging (like the 1000-round case) or in an airtight, moisture-proof container (such as an ammo can) in a cool, dry environment. Avoid extreme temperature fluctuations and high humidity. While IMI ammunition is robust, proper storage helps maintain its primer and powder integrity over many years.

Q: Is IMI Systems ammunition good quality?

Yes, IMI Systems (formerly Israel Military Industries) is highly regarded globally for producing high-quality, military-grade ammunition. They are a major supplier to defense forces around the world, known for their rigorous manufacturing standards, consistency, and reliability. Their M855/SS109 ammunition is a testament to their commitment to excellence.

Conclusion: The Smart Choice for 5.56mm Shooters

In conclusion, the IMI Systems 5.56x45mm M855/SS109 62 Grain ammunition, particularly when purchased in a 1000-round case (identified by product codes like ARMS 50173 or IMI 50173), represents an outstanding value and performance proposition for any serious rifle owner. Its NATO-spec consistency, renowned reliability, and unique ballistic properties make it a versatile choice for everything from routine range practice to advanced tactical training and essential preparedness.

Choosing this ammunition from a trusted retailer like DEGuns.com further enhances the value proposition, ensuring you receive authentic, high-quality product backed by excellent service. For anyone looking to stock up on dependable 5.56mm ammunition that delivers consistent results, the IMI Systems M855/SS109 is an investment that pays dividends in confidence, proficiency, and preparedness. Elevate your shooting experience by making this military-grade standard part of your ammunition inventory today.

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Product Specifications: IMI Systems 5.56x45mm M855/SS109 (ARMS 50173)

Feature	Specification
Caliber	5.56x45mm NATO
Bullet Weight	62 Grains
Bullet Type	Full Metal Jacket (FMJ) with Steel Penetrator (SS109/M855)
Casing	Brass, Boxer Primed
Quantity	1000 Rounds per Case
UPC (Example)	814034026362 (Typical for IMI M855 1000rd Case)

Ballistic Performance (Approximate from 20" Barrel)

Metric	Value (Approximate)
Muzzle Velocity	3,100 feet per second (fps)
Muzzle Energy	1,324 foot-pounds (ft-lbs)
Optimum Twist Rate	1:7" or 1:9"

Comparison: M855 vs. M193 5.56x45mm Ammunition

Characteristic	M855/SS109 (62 Grain)	M193 (55 Grain)
Bullet Weight	62 Grains	55 Grains
Core Material	Steel Penetrator + Lead	Lead Only
Primary Use	Enhanced Penetration, NATO Standard	General Purpose, High Velocity
Typical Twist	1:7" or 1:9" (Faster)	1:12" or 1:9" (Slower/Versatile)
Appearance	Often "Green Tip"	No specific tip color