Rocket CNC M4 Hop Unit

Rocket CNC M4 Hop Unit A full metal M4 hop unit based on the original 'triple dial' design for when rotary hop units are incompatible with your rifle. These fit most standard M4 AEGs on the market and are machined to a higher quality than the originals. They come with everything you need for an easy installation including the tension spring, C-clip, hop rubber and brass ring. Features: Aluminium construction Includes hop rubber Classic design