From the same rulebook you linked: • 3.2.4 Production Optic Firearm – Same configuration as a Production Firearm in Rule 3.2.2 with the exception of addition of an optic and that revolvers are not allowed. The following will apply:
(a) Pistol must be able to fit into Production Box if optic is removed
(b) Optical and or electrical sights must be attached only to the slide between the ejection port and the rear of the slide