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American Reserve Munitions

American Reserve Munitions ARM - 9MM 124gr. Counterstrike Defense - "The Gatekeeper"

Product Code : 685450679374


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All Copper Hollow Point (3 Petal Design)

"The Gatekeeper" bullets are precision CNC machined, lead free, solid copper expanding projectiles.  The projectile expands to meet FBI penetration requirements while maintaining nearly 100% of its original weight.  Each "Gatekeeper" projectile has been engineered to perform in a given velocity range to provide unparalleled performance across a wide variety of calibers and weapons platforms.  This projectile is used for personal protection, provides equivalent and often superior performance to market leaders such as Speer Gold Dot ammunition.  The "The Gatekeeper" projectile is available for both public and law enforcement purchasing.  The bullet is designed to create maximum cavitation upon entry into the body and expend all its energy inside the target. The combination of maximum stopping power with minimal over-penetration makes it an ideal choice for personal protection. 

Shell Shock Technology 

NAS3 Two-Piece Shell Technology 

  • Engineered for the future: 50% lighter and 2x stronger than brass
  • Outperforms nickel-plated brass on every level
  • Uniform wall thickness proprietary assembly techniques = reliable and consistent velocity, 0.93 fps standard deviation (see SST Independent Test Report)
  • Reloadable
  • Ejects cool to touch
  • Made in the USA

Technical Information

  • Caliber: 9mm Luger
  • Bullet Weight: 124 Grain
  • Bullet Style: Gatekeeper
  • Case Type: Shell Shock
  • Ballistics Information:
  • Muzzle Velocity: 1100 
  • Muzzle Energy: 333

Determined at checkout.