AAC21/KJ M700 Hop-up Chamber

The Action Army KJ M700, AAC21 hop-up chamber uses a new and innovative system for extremely precise adjustment of pressure placed upon the hop-up bucking. 

- Driving or losening the screw, hop-up lever will be up and down by smart mechanical pressure 
- Smart mechanical pressure can avoid the o-ring fail which results in a leak 

Weight: 115 g