- JB Unicorn Tight Bore 6.03mm Barrel - M4+ Series, 407mm (16.02in)
JB Unicorn Tight Bore 6.03mm Barrel - M4+ Series, 407mm (16.02in)
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Hard Anodized, aluminum construction. Should increase FPS by 10-20 without additional modifications.
Special order. Please allow 7-14+ days for delivery. No returns.
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