Prometheus Hop Up Tensioner Flat Type - 2-Pack

A very innovative Hop-Up rubber buffer knub.

• Designed for low stress and high performance.
• Featuring the bridge type Hop-Up buffer knub.
• Enhance BB flight in a long and straight line, with wider contact point to stabilize the BB.
• Super hop up effect.
• 2 pcs included (hard and soft)
• Can use in any brands of hop up rubber packing