Lonex Internal Upgrade Series Hopup Unit

This Lonex Enhanced Hop Up for M4/M16 Series Rifles is made from Aluminum and Polycarbonate. This unit is compatible with M4 / M16 style rifles that utilize a single piece hop unit.

FEATURES:

- Reinforced Hop Unit is Built from an aluminum alloy

- New Design Improves air seal and shock absorption for increased accuracy and consistency

- Polished interior to increase the speed and smoothness of the BBs traveling through for greater reliability