The MadBull RAS Fix is an ingenious way to solidify any rail system that twists and does not mount solidly onto the receiver. It can double as a scope riser.
When the MadBull RAS Fix is mounted on a rail system, it bridges between the rail and the receiver. With it's solid mount on both parts, it creates a rigid bridge to lock the rail system tightly to the receiver. The MadBull Ras fix looks similar to the Knights RAS II, and is much less expensive.
You can easily mount a red dot on top of the RAS fix, which puts it at the ideal height on any M4.
MadBull RAS Fix V1 Features:
-Aircraft Aluminum Construction
-Fits all brand Rail System
-Eliminates Twist on M4 RIS
-Can be used as low profile riser