It turns Glas Heart into a literal glass cannon. The firepower is more or less unmatched as the crystal barrels hyper-focus the beams that it even leaves damage on Silent Zephyr's shields D:
However, since they're brittle
Even those phalanx bits on the rifle are mostly crystalline in structure with only a small section at the rear holding the electronics and propulsion system. When attached to the assault rifle to form the sniper rifle... it actually looks like a BFS when it's actually a BFG than has minor function as a BFS.