Maple Leaf Hummingbird Short-Stroke Bolt Assembly Kit For GHK M4 V2 GBBR Series

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For GHK M4 V2 GBBR Series - Increase Bolt Cycling Speed - Direct Fit in GHK M4 Type GBBR Series- Fit For NEW and OLD Generation GHK M4 GBBR Series- Material: Zinc Alloy and Stainle ss Steel- Comes in Complete Bolt Set with Nozzle ( ~1.3J @0.2g BBs Muzzle Velocity ) *Must Use it with SKU: MAPLE-M4GBB-SA ^ Maple Leaf 1913 Rail Stock Adapter For AR15 / M4 GBB Airsoft. Show more