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1. Attach the rotary dial to the back of the hop up chamber and attach the O-ring.
2. Place the bucking onto your barrel and insert the barrel into the opening of the chamber.
3. Attach the barrel clip and slide on the barrel ring. ※for KRYTACs, please use the original barrel spring instead of the barrel ring.
4. Insert the hop up nub or tensioner into the hop up window in the chamber.
5. Install the hop arm and secure it with the retaining pin.
1x Hop-Up Chamber
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