Nightforce Clamp-on Power Throw Lever (PTL) NXS -A288:

Nightforces Power Throw Lever (PTL) is designed for extremely fast and easy magnification changes from any shooting position, in any condition. Quickly zero or make changes on the fly even in gloved hands. No modifications to the riflescope required

Features:

• Adapts to older models
• Fits NXS 15x, 22x, 32x, 42x
• Easily removed