I've got the Nitro Extreme.... Great sight, just call Trophy Ridge and get them to send you allen screws to replace those thumb screws (can't get the thumb screws tight enough to prevent moving)

Other than that, cut a limb saver in half, attach one half to the front of the sight, the other half to the bracket coming from the riser, and you've now created the Matrix (with the DVD vibration modules)...

Jim.