Lonex Metal M4 Hopup Unit

This is a complete Lonex hop-up unit for M4 and Armalite series rifles. It's main body is made from zinc which is more rigid than stock plastic hopup units, this added rigidity increases accuracy with proper tuning. It comes complete with all the parts of the hop-up unit. The quality of the molding for both the zinc and plastic is much better than it's SHS counterpart. The gears fit perfectly which prevents the adjustment from fluctuating.

Specifications:
- Materials: Zinc alloy and nylon
- Use: M4/M16 and other Armalite series rifles