Mad Bull 60 Degree Shark Hop-up Bucking (2pk with options) Style:Red (Hard) w/Fishbone Locking swivel mechanism allows for

Locking swivel mechanism allows for angle adjustment

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

13" polymer M-LOK handguard

Min Temp: -65 F

Made out of heat resisting compound

Mad Bull 60 Degree Shark Hop-up Bucking (2pk with options) Style:Red (Hard) w/Fishbone Locking swivel mechanism allows forThe 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.