Torque Bow

From Gears of War Realm - Gears of War Wiki Strategy Guide

The Torque Bow is one of the standard weapons of a Theron Guard. It is a bow that fires an arrow with an explosive charge. It can be fired by holding the Right Trigger to charge the shot, then holding the Left Trigger aim. An arc will appear showing you the arrows path, very similar to the way the grenades work. When the arc ends on your target, release the Right Trigger. If you've held the right trigger long enough and the arrow has high enough velocity, it will puncture your target, then explode, usually causing death. (In Hardcore or Insane setting, or multiplayer)

The Torque Bow is also very effective at closing Emergence Holes from a distance.