GSI Expert HOP Wing GBB Hop-Up Rubber Style:Red (Hard) if your lenses take a

if your lenses take a beating or you're just in the mood for a change

2 gear set compatible)

including those from leading brands such as:

Full Metal Scope & Mount

Takes 1x CR123 Battery

GSI Expert HOP Wing GBB Hop-Up Rubber Style:Red (Hard) if your lenses take aThe GSI Expert HOP Wing Two Way Type Hop Up Rubber is a must have accessory for airsoft gun owners. Made with synthetic rubber, this hop up rubber is designed to withstand all seasons, with little change in friction coefficient due to temperature changes. The two way type design and special construction ensures a consistent loading position for bullets, resulting in improved accuracy and performance. As the best sharpshooter of airsoft guns, this GSI