The company will give a raw weight without the extras. For example, forks will be weighed before painting and without compression bolt and removable mounts. Frames also will be weighed raw and without removable mounts, tabs and guides.
Thats not the case in all companies.
Thats right, but its still a method used to gain extra sales.
Whats sad is people going by weight, which bites you in the butt. Consumers buy the lightest parts. Companies then try to upgrade by reducing weight each year. For me though, weight loss each year is a downgrade because its less material each year.
Years ago, some guy ended up in a wheelchair because his forks snapped. Consumers driven by weight instead of strength are not helping anyone. Not helping themselves, the industry or the sport.
A well designed part with an excellent strength to weight ratio is far more important than the lightest part.