UNICORN Precision Grade GBB hop-up rubber (hardness: 80°) designed specifically for gas-operated GBB rifles (Tokyo Marui, VFC, KJ, etc.). High-quality NBR rubber composite, designed specifically for GBB rifles (TM, VFC, KJ, WE and even VSR barrels). V-shaped contact surface centers the bullet precisely, improving accuracy and flight. Durable, oil-repellent material and easy drop-in installation without mods
Features:
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Material: durable, heat and oil resistant NBR rubber
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Design: arrow-shaped, centers the ball precisely
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Compatibility: GBB and VSR systems (Marui, VFC, KJ, WE)
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Installation: easy drop-in; no modification required
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The manufacturer recommends using balls over 0.25g for optimal performance
