Shepard's carrying a real sniper rifle (can't let Garrus get too cocky about his scores) when she comes across Megatron stripping his simulated one and stops to watch. Drift had been perfectly nice, so Shepard has no reason to suspect the new Cybertronian will be otherwise, at least within the realm of normal behavior. Some people are just naturally set a little crankier, y'know? But she's not going in expecting Sovereign's more flamboyant cousin.

"What does it shoot?"

Bonding over guns...this should be an easy one.