The MEGA Construx Halo FRM20 Faithful Vs Fallen Battle Pack Set is a 90-piece interlocking block set featuring characters from the Halo series. Released in 2017, this set includes pieces to build Scout figures from the military and weaponry theme. Made of plastic, the set is compatible with other MEGA Construx products and is a new release from the Halo franchise. With a focus on military and weapon designs, this set is perfect for fans of the Halo series looking to create their own battles in a building toy format.