Mad Bull 60 Degree Shark Hop-up Bucking (2pk with options) Style:Red (Hard) w/Fishbone Resistant to High and Low

Resistant to High and Low Temperatures (-45C to +180C)

Built-in Weaver-style Rail for tactical accessories

over 18 inches long

13" polymer M-LOK handguard

Mad Bull 60 Degree Shark Hop-up Bucking (2pk with options) Style:Red (Hard) w/Fishbone Resistant to High and LowThe Shark Hopup Bucking from Mad Bull was originally designed to prevent double feeding by incorporating 3 fins inside the bucking to aid in securing the BB. The design also improves compression which in turn improves both consistency and in some cases FPS. The 3 fin design paired with the "Fishbone" style spacer also improves the surface area which contacts the BB. This in turn improves both consistency as well as the range of hop up adjustability.