$292.50
The rear cap assembly fits at the rear of the Graco Fusion FX spray gun. Graco's service manual lists it as the rear safety cap and the exploded diagram calls it the rear cap assembly, so this is the part to order when the rear cap on your gun is damaged or worn.
Graco supplies it as a kit, so the cap arrives as a complete assembly rather than as loose pieces you have to source separately. Check the FX exploded diagram before ordering to confirm the rear cap is what needs replacing, and match the part number to your gun so the right assembly comes back.
Genuine Graco OEM part 2000971.