The Marines, who know a thing or two about logistics, have been using K-MAX unmanned cargo helicopters to move some seriously heavy freight in southern Afghanistan, as blogger Steve Geary points out on the logistics and supply chain site DC Velocity.

Geary notes that K-MAX unmanned cargo copters have flown 1,300 missions during the past 18 months, and he takes a few potshots at Amazon’s tiny octocopter, which is designed to carry no more than five pounds. “This is not some hobby shop toy like you see in the Amazon press releases,” he says of the K-MAX. “The Marine Corps version of a delivery drone can carry up to 6,000 pounds of cargo.”