Senjen might have been able to shoot immediately, but Light had been hugging a bit too close to the inside column, and moving a bit too far forward, so there was too much of a risk of friendly fire. In the few moments that followed, Senjen was frankly surprised by what he saw. Light had been close enough when he ran into the droid that grabbing the weapon was not too much of a stretch, but remarkably, his suit was even able to keep the weapon at bay as he struggled over it with a war droid. Granted, Light grabbing it by the barrel did give him an advantage in leverage, but still, he had no idea that QV suits could have so much power behind them. It certainly did not look like it from appearances.
In any case, while these thoughts were running through Senjen’s mind, he pushed off of the wall in Light’s direction to give himself an angle to shoot down on the droid from above, without Light in the way. It was unlikely to be especially armored from directly above, and the repeater was stronger than his pistol regardless. Since he still was having to shoot one-handed, he locked his elbow to keep the arm steady right before firing, then shot a burst right down the center line of the droid’s frame from straight above.
In any case, while these thoughts were running through Senjen’s mind, he pushed off of the wall in Light’s direction to give himself an angle to shoot down on the droid from above, without Light in the way. It was unlikely to be especially armored from directly above, and the repeater was stronger than his pistol regardless. Since he still was having to shoot one-handed, he locked his elbow to keep the arm steady right before firing, then shot a burst right down the center line of the droid’s frame from straight above.