Various reports indicate that the FBI, DHS, and others were called in because of the discovery of 40mm armor piercing grenades.

I’m trying to track down what they could be talking about, since these articles note that the grenades are used in conjunction with a launcher, but the launcher wasn’t found. They could be referring to a variant of an RPG-7 armor piercing round of this sort.

That could indicate that someone else in Ready’s group(s) knew of the equipment and/or provided the gear.

I would expect to hear of arrests in coming weeks of others in Ready’s group for having these illegal arms (along with new details of how they came to be in possession of them in the first place - such as stolen from approved military stocks, etc.)