Action Army 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