Save eight percent on orders over $300 on high-performance 55gr 5.56x45 NATO rounds with code 556ISBACK! from March 31 – April 11, 2026, at www.shellshocktechnologies.com.
Eubank, KY – Shell Tech™, the ammunition branch of Shell Shock Technologies, LLC. (SST), a leading innovator in the ammunition industry, today announced the return of its highly sought-after 5.56x45 NATO Full Metal Jack (FMJ) ammunition, now back in stock and available for purchase. The premium 55-grain rounds, engineered for competitive shooters, marksmen, and range enthusiasts, feature SST's patented NAS³™ nickel-stainless steel alloy cases, delivering outstanding reliability, precision, and performance at standard SAMMI pressures. From March 31 to April 11, 2026, customers can save eight percent on orders over $300 at www.shellshocktechnologies.com with the use of the discount code 556ISBACK! at checkout.
"We know our customers have been waiting for this ammunition to come back, and we're thrilled to deliver. Shell Tech's 5.56 FMJ rounds represent everything shooters demand: superior performance, reduced fouling, lighter weight, and compliance-friendly lead-free construction, all powered by the advanced NAS³ casing technology that sets Shell Shock Technologies apart from the competition," Peter Foss, Managing Partner and CEO of Shell Shock Technologies.
Shell Tech's 5.56x45 NATO FMJ ammunition is optimized for speed, accuracy, and control. The 55-grain projectile achieves a muzzle velocity of 3,150 fps with 1,212 ft-lbs. of energy, delivering fast, flat projectiles with reduced recoil for faster target re-acquisition between shots. The round is compatible with M4-series rifles, AR-15 platforms, and all standard 5.56 NATO-chambered firearms.
At the heart of Shell Tech's 5.56 FMJ is SST's proprietary NAS³ casing, a two-piece nickel-stainless steel alloy design engineered to outperform traditional brass in every measurable category. Unlike conventional steel cases, NAS³ cases are lighter than brass, gentler on firearm extractors, and designed for smooth, consistent ejection. The advanced alloy construction resists corrosion, reduces bore fouling, and provides superior case alignment for optimal accuracy.
Key Features Include:
- SST NAS³ nickel-stainless steel alloy casing: lighter than brass, corrosion-resistant, and gentler on extractors
- 55gr projectile | 3,150 fps muzzle velocity | 1,212 ft-lbs. muzzle energy
- Flat, fast, and accurate trajectory with reduced recoil for faster target re-acquisition
- Increased cycling efficiency and feed reliability
- Reduced bore fouling for cleaner, longer shooting sessions
- Lead-free construction for compliance at indoor and restricted-use ranges
- Magnetically retrievable case for easy range cleanup
- Chambered for 5.56x45 NATO; compatible with M4-series, AR-15, and military-style rifles
Shell Tech 5.56x45 NATO FMJ ammunition is now back in stock. Visit www.shellshocktechnologies.com to place your order using code 556ISBACK! to save eight percent on your order of $300 or more from March 31 through April 11, 2026.
Keep up with Shell Tech's advanced ammunition on the website and social media platforms: Facebook, Instagram, X (formerly Twitter), and YouTube.
About Shell Shock Technologies and Shell Tech Ammo:Shell Shock Technologies, LLC (SST), headquartered in Eubank, Kentucky, is a leading innovator in advanced ammunition case design and manufacturing. Since 2015, Shell Shock has supplied hundreds of millions of high-performance cases to commercial ammunition companies, U.S. defense contractors, and international defense allies. The company's patented, lightweight, and durable cases are engineered to enhance precision, reliability, and functionality across a variety of applications. Expanding on this legacy, Shell Shock introduced Shell Tech, a new line of factory-loaded, hand-inspected ammunition designed for hunters, sports shooters, and defense professionals. Produced at our Calhoun, Georgia, facility, Shell Tech ammo brings unmatched quality, accuracy, and consistency directly to consumers.
Committed to ongoing innovation, Shell Shock's engineers continually develop advanced materials and processes, including pioneering lightweight ammunition links for belt-fed machine guns. With a focus on performance, dependability, and customer satisfaction, Shell Shock and Shell Tech set a new standard in ammunition technology.
For more information, please visit www.shellshocktechnologies.com or follow us on Instagram at @shellshocktech.