The Mk2. version of HAO Cylinder keep all the goodies of MK1.
We improve the surface of both piston and cylinder's inner wall to make it smoother and less resistance. 
And we now using higher grade of ladder gear and NBR rubbers.
 
It was the best and now it's better.
 
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Sick of loosing index screw? or tired of adjusting the weak and wobble aluminum extrusion rail inside the cylinder?  

Introducing the HAO's Advanced PTW Cylinder. 

The cylinder which combined the latest HAO's technology in:
 
	
One piece SUS303 cylinder body with EDM precise wire cutting piston rail.  
	
Enhanced polymer injected piston.
	
SUS303 anti-twisted spring rotation bearing system.
	
S45C heat treated EDM wire cutting ladder gear.
	
SUS303 enhanced nozzle.
	
All re-design and reinforce NBR rubbers, O-rings.
	
BCGS (Bolt Carrier Group Sticker) make your PTW more like RS.  
	
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	*Notice: BCGS only compatible on HAO's Advanced PTW Cylinder with pre-milled 0.2mm thick depth slot for easy insert / withdraw without damage the sticker.
	
	*Notice: Please shoot the first 500 rounds gently in order to meet the best occlusion and performance.
	
	*M90-M110 Cylinder's piston rack are only design for Low Velocity & High rate of fire use , please do not change for the higher spring, any modification on the spring will damage the rack!*