The hop-up unit is constructed from alloy to reduce flexing over traditional polymer hop-up units and features polymer wheel cogs and retaining clips. this is a great upgrade for stock airsoft m4 / ar-15 / m16 rifle and especially when used in combination with a new hop-up bucking and barrel set. this is a perfect purchase for those airsoft skirmishers looking to bring their project guns back to life, or for those with little tech knowledge who are also looking to upgrade their weapons. perfect upgrade alloy hop-up unit screws & clips included name designation: ultimate upgrade m15/m16 hop-up chamber manufacturer: asg construction: alloy body with polymer adjuster cogs compatibility: most airsoft m4 aegs no flex o-ring sealed between hop and front of your gearbox excellent quality finish once fully built the gears are hard to turn, this is great as it retains your hop stiffer gears reduces chances of vibration un-doing your hop settings all necessary screws and retention clips are included

What's in the box
1 x Asg 16635 hop-up chamber m15/m16 series

Disclaimer
CAUTION: This product should be used for lawful purposes and handled safely. Follow recommended and appropriate use of ammunition and wear protective gear. Using this product for unlawful purposes to cause death or serious bodily harm is an offence.