CNC Hop Up Chamber AR15 UNI in stock Weight: 30 g Shipping weight: Kleur:Everglade Weight: 30 g Shipping weight: 49 g Crafted from a single slab of SK 5 high carbon steel and covered in a rust resistant powder coating Retro Arms Their main products are made from durable aircraft EN AW 7075 aluminium and machined on precision CNC machines