Replacement factory cocking guiding rail / backbone for the FX Impact M4 air rifle. Dovetail top rail.

This keeps the complete rifle from twisting. Commonly if the rifle is dropped this part can become warped / twisted and cause number of issues such as accuracy problems and being able to place the magazine into the rifle.

Will work with other versions of the FX impact, but will not work with the original FX “tri” picatinny rail.
Other accessories to work with this rail:
Side picatinny
Top picatinny
M4 Cocking system