HOW HEAVY ARE THEY? Really heavy:
Masses of bases, including figure/ratio of mass to mass of Hasbro solid

Hasbro lightweight: 1.71 gm/ 0.86
Hasbro Solid: 1.98 gm/ 1.00
Pitch Surfer: 2.04 gm/ 1.03
Parodi: 2.06 gm/ 1.04
C6 Astrobase: 2.34 gm/ 1.18
Sure Shot: 2.57 gm/ 1.30
Raptor G2: 3.56 gm/ 1.80

So the Raptors are monsters, 80% heavier than a Hasbro solid and a
whopping 108% heavier than a lightweight. I still have to measure a
standard raptor.
Keep in mind that there will be very slight changes because of
different figures. It doesn't make sense to measure the figures alone
because different bases require different amounts of filing of the
post.
-WW