Picatinny Stock and Sling/Holster Mounts for Nucleus

I liked the profile of the Nucleus, but I wanted to have multiple ways to run it and fit it into loadouts, thus I added a rear picatinny mount that can be used for a stock or sling mount as well as holes that fit the Protean sling mount or Fid/Midlock mounts. I have provided file options for both of the added features as well as files for just one or the other.

Altered the Pusher Cover to add a picatinny stock mount and holes for the Protean Sling or Mid/Fidlock mount.