This is how easy:
1. Pull down on delta ring to remove plastic handguard (may require a flat screwdriver to split handguard apart)
2. Slip new CASV-M over barrel and gas block making sure flange on new guard slides into notch on delta ring
3. Tighten the two scews that hold the new rail onto the flattop rail using supplied allen wrench.
4. Add supplied rails of various lengths wherever you want them.
If you don not want to get a gas block height front flip up then do what I did and add one of the rail pieces to the top front of the new handguard so everything sits on the top rail at the same height. Front sight, rear sight and red dot are all on the same plane and have the same point of impact. I don't know if I just lucked out that the mount on the truglo made the red dot line up with the mbus front and rear sights or if it was designed that way. Normally, you would be lucky if you can co-witness through the upper or lower 2/3 of the red dot glass after messing around with different mount heights. So being dead on the dot in this case is pretty cool.
The stock is an ACE skeleton stock. They are one piece, not collapsible. I swiped the lower off my grendel for use with the Beowulf. Not sure if I want to spend the money on a dedicated lower.