PROMETHEUS HOP UP TENSIONER SOFT & HARD (FLAT TYPE)
A very innovative Hop-Up rubber buffer nub.
Designed for low stress and high performance.
-Featuring the bridge type Hop-Up buffer nub.
-Enhance BB flight in a long and straight line, with a 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