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The EV-5 proprietary rifling technology, utilized by Heller Arms and Tactical Ordnance, is a hybrid rifling design that combines features of polygonal and traditional rifling to optimize firearm performance.

Key Features of EV-5 Rifling:

• Hybrid Design: EV-5 rifling merges the superior sealing and ease of cleaning associated with polygonal rifling with the positive bullet grip of traditional rifling. This results in enhanced performance characteristics.
• Material: Barrels with EV-5 rifling are typically made from 416R stainless steel, known for its durability and resistance to corrosion.
• Five-Land Configuration: The EV-5 employs a 5-land hybrid rifling pattern, which contributes to its performance benefits.

Performance Benefits:

• Higher Velocities: Improved bullet sealing leads to more consistent and higher muzzle velocities.
• Extreme Accuracy: The design enhances precision, making it suitable for long-range shooting.
• Less Bullet Deformation: The rifling reduces in-flight bullet drag by minimizing bullet jacket distortion, which helps maintain ballistic stability.
• Easier Cleaning and Maintenance: The hybrid design facilitates faster break-in periods and reduces fouling, making the barrels easier to clean and maintain.
• Longer Barrel Life: The reduced stress on the barrel and bullet contributes to extended barrel longevity.