Silverback Airsoft Variable Mass Piston for Pull Bolt SRS Series Airsoft Sniper Rifles by Silverback Airsoft 0 G&P Improved Groupings for a Variety

Improved Groupings for a Variety of Setups

the whole carbine can be holstered

- manual keypad lock

pry bar safely

Silverback Airsoft Variable Mass Piston for Pull Bolt SRS Series Airsoft Sniper Rifles by Silverback Airsoft 0 G&P Improved Groupings for a VarietyA special variable mass piston compatible with the Silverback SRS. It is used to precisely adjust the muzzle energy of the SRS replica using four aluminium and steel weights. Will allow you to tweak the muzzle energy of your SRS by adjusting the piston mass from 40 to 137 grams with 15 different configurations. Aluminum construction with steel piston end. Rubber silent piston head. For "Pull Bolt" SRS systems. Adjust and fine tune the joule output of