What does the Modstock weigh with a Magpul MOE stock and MIAD grip?
There are 5 variants of the SAGE EBR, 4 of them are available to the public.
The one that best compares to the Vltor Modstock is the M14ALCS/CV
it is the lightest SAGE EBR chassis with a pistol grip.
The better known Mod 1
is the heavier version of the M14ALCS/CV.
I think that you will find the Vltor and M14ALCS/CV (picture)
weigh about the same
when set up with the same kit and this weight includes the EBR's cluster rail.