As previously announced, Airsoftjunkiez got a series of upgrade parts made by Silent Industries for the Wolverine Airsoft MTW and one of these is the Silent Industries CNC Aluminum MTW Hop Up Arm - Type 1... "This hop up arm features an integrated concave nub for the best performance, while being very user friendly.

The nub is optimized so it won’t protrude into the chamber when hop-up is set to the lowest adjustment, this means you will not have a problem with over hopping BB’s at the lowest setting.

We recommend using regular type buckings like Madbull Blue, Madbull Red Shark and high quality heavy BB’s (0.36+)

Follow these easy steps to install:

• take out the stock hop-up/barrel assembly
• pop out the pin (don’t lose it, you will need it)
• take out your stock plastic hop-up arm and nub
• simply drop in your new CNC arm and add a little hop-up just to add tension the system, so the pin doesn’t fall out.
• done"