The Accuracy International AT Night Vision bracket is designed for the AT Rifle System only.
To complete the NV bracket, a 20 MOA accessory rail is needed in order to mount clip-on night vision or thermal optics.
*Note: Proper alignment of the Night Vision bracket system is only compatible with High-Action Rail AT Rifles.
If your AT Rifle has a Low-Action rail, it will need to be replaced with the High-Action version.