There is an incorrect in the general information paragraph of the main text. We need to change 7.86 kg to 6 kg. Both the US and UK adats documents need to be changed.
The MIM 146 should have a 12.5kg warhead which would mean that the documents would be more coreect than the measly 6.0 kg. It could have been a nerf though.
Warhead weight is not the same as explosive mass, warhead includes casing and fuse weights (among other things).
Oh my bad, I read the document wrong. I thought it meant the weight of the explosives within the warhead.