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400 FPS Upgrade (400 FPS Spring Installed) - $40 |
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Classic Army Torque Up Gear Set Installed (Increases durability) - $65 |
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Reinforced Cylinder Kit Installed (Adds 5-20fps and increases durability) - $70 |
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MB Tightbore Inner Barrel Installed (Adds 5-15fps and increases accuracy) - $50 |
Important Information:
The full stock versions of the MP5 can hold a large battery which is needed for the 400FPS upgrade. Increased stress from the 400FPS upgrade decreases the life of the gun unless the gears and cylinder set are also upgraded. The tightbore inner barrel upgrade does not decrease the life of the gun. Upgrades are usually done within 24 hours of purchase. All guns are test fired before shipment to ensure proper functioning.
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