Well to be fair, lifting something and being able to aim it are two different things. For example, I can lift a 50lb barbell but if I duct taped it to a C7, I doubt I could fire it accurately. A pair of scouts could probably do the gun run and get it back fast, they'd just be SOL if more imps found them.

EDIT: Lilly probably would be hard pressed to drag one of those back, though. She is fleet of foot, but not exactly strong.