KJ Works Piston Block Set - Assembled For Shadow 2 Airsoft GBB (Parts #41, 94, 15)

KJ Works Piston Block Set - Assembled For Shadow 2 Airsoft GBB (Parts #41, 94, 15) Design For Replace the Original Parts (#41, 94, 15) Suitable For ASG CZ Shadow 2 Gas Blow Back GBB Airsoft Pistol