Sorry lads, We don't ship this to US now on. 
 
TYPE Hardcore : the can weight 530g/18.6oz (GenI: 556g) Full Steel made
TYPE Airsoft: the can weight 231g/8.1 oz Full Alloy made
 
Improvment from Hardcore Gen I to Gen II. Benefit from the CNC lathing skill improving . Weight reduce about 10% compare with Gen I.
Gen II use alloy collar with anodizing color. Gen I use steel made collar with cerakote color.
Gen II using thinner teeth as RS version on locking mechanism. Gen I use wide teeth.
 
The airosft version is made of one peice alloy bar with screw in end cap. The locking device is the same as the hardcore version but way lighter, provide a option for comfortable gaming play experience.
 
See some leak on the The Reptile House's blog
 
Compatible with HAO's or RS : 3P/4P/SFCT muzzle brake https://www.haoptwart.com/muzzle-brakes
Clip: https://www.youtube.com/watch?v=P6GOnAGMSX0
 
**DO NOT use O-ring to adjust the align the profile of flash hider. Using o-ring will cause flash hider tilt and affect the muzzle direction of suppressor .
You should use the washer we provide with the flash hider.
 
All products sold by HAO are intended for Airsoft use only. Other uses are prohibited. Any modification including painting, marking or wiping the cover/instruction stickers is prohibited, and may be a violation of law. Customers assume full legal liability for any modifications they perform, absolving HAO of any responsibility.
 
Made in Taiwan
BB type: 6mm 0.2g BBs
Power source: Green Gas 9Kg / 11.1V PTW ,AEG
Power: 90 m/s = 0.81J with 0.2g BBs
J / cm2:  2.835 J/cm2
No primer using function