The HAO 416 Gas block and piston is standard equiped in the HAO PTW 416V2 kit.
## The Gas Block is for Airsoft use only. DO NOT apply on firearms 
*Marui 416 AEG competiable (The screw under the stock Marui gasblock block is required)
*WE 416GBB competiable (Spring pins fit but the screw don't)