SAT HIGH PERFORMANCE OUTPUT VALVE M870

Product Overview

Features:

• The SAT High Performance Output Valve is made specifically for the M870 from Tokyo Marui with the original stock and NOT for the G&P or Angry Gun stock modifications as there are leaking issues.
• This will allow you to use Green Gas with no problem and also boost the FPS by about 30 allowing your M870 to shoot at around 360 FPS!