The Saber Tactical Extended picatinnty rails allows you to extend the short picatinny rails underneath the FX Impact.

The Arca Swiss 2 accessorie rail from Saber Tactical is next generation of the Arca Swiss rail.
The difference is that this variant has T-slots on both sides for mounting other accessories like lights, lasers, etc.

This rails offers a 3-in-1 solution:

1. Arca Swiss rails for a comfortable grip and smooth sliding over an sandbag.
2. Threaded for tripod camera adapter
3. Picatinny end for mounting a bipod or other accessories.
4. T-slots on both sides