Maxx Model Hop-Up and Adjuster Set M4T for TM MWS M4 GBBCNC Aluminum Hopup Chamber Adjuster M4T set is precisely machined from a solid aluminium block to perform accurately and consistently for Tokyo Marui MWS M4 Gas Blowback Airsoft Rifle. The Hopup Adjuster M4T unit is built with a unique Rotary Dial Knob, a number indicator for precise hopup adjustment, and to prevent shifting under vibration. The Bolt Stopper Damper is also adjustable to mitigate the Bolt Carrier bounce to eliminate double feeding of