• Macro close-up view highlighting the 20mm internal taper muzzle crowning and polished stainless steel walls of the SPARK Hiei Kai 6.05mm tight bore inner barrel by AIRSOFT97.
  • A row of stainless steel SPARK Hiei Kai 6.05mm tight bore inner barrels by AIRSOFT97 displaying their precision cut hop-up windows and laser-engraved alignment markings.
  • An automated high-precision CNC Swiss lathe machine in Japan milling the hop-up window onto a stainless steel SPARK Hiei Kai inner barrel by da Vinci for AIRSOFT97.
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SPARK (Airsoft97)

SPARK Hiei Kai 6.05mm Tight Bore High-Precision Inner Barrel for Electric Guns

SPARK Hiei Kai 6.05mm Tight Bore High-Precision Inner Barrel for Electric Guns

$94.99 USD
$94.99 USD
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Inner Barrel Length
The SPARK Hiei Kai 6.05mm Tight Bore Series provides the ultimate mechanical solution to velocity drop and downstream grouping inconsistency in custom AEGs. Engineered through an exclusive partnership between Airsoft97 and the master metalcraft technicians at da Vinci, these high-end barrels are meticulously shaped using the highest grade domestic cold-forged stainless steel.
The 6.05mm tight-bore ID (Inner Diameter) maximizes compression tracking directly behind the projectile, capturing compressed air expansion efficiently. This concentrated seal results in an immediate increase in muzzle velocity (FPS) while maintaining the rigid, flex-free stability required for repeatable long-range semi and full-automatic accuracy.
This master craftsmanship series serves two crucial engineering purposes across its specific lengths:
  1. Velocity Efficiency Management: Captures maximum pneumatic pressure from the gearbox cylinder, boosting overall energy output without forcing you to use heavier, high-stress main springs.
  2. Muzzle Turbulence Dissipation: Features an integrated 20mm super-long internal taper at the muzzle tip, smoothing air expansion behind the BB as it leaves the barrel to prevent flight paths from destabilizing.

Technical Specifications:

  • Material: Highest grade domestic cold-forged SUS304 stainless steel
  • Bore Diameter: 6.05mm Tight Bore (Tolerance controlled via pure domestic CNC machining)
  • Muzzle Design: 20mm Super-Long Air-Dissipation Taper
  • Package Contents: 1x SPARK Hiei Kai 6.05mm Tight Bore Inner Barrel (of chosen length selection)
  • Compatibility: Tokyo Marui-specification AEG hop-up chambers
  • Origin: 100% Made in Japan
Tech & Safety Warning: Due to the precision 6.05mm tight-bore architecture, using low-tier, out-of-round, or recycled BBs will cause immediate inner-barrel jamming and major structural piston damage. Always pair this barrel with premium, high-density precision BBs.
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