The Durable Reconnaissance and Observation Platform (DROP) was a prototype robotic platform with the ability to climb concrete curbs and stairs. It could also climb surfaces up to 85 degrees at a rate of 25cm/s, make rapid horizontal to vertical transitions, carry an audio/visual reconnaissance payload, and survive impacts from 3 meters.

DROP was manufactured using a combination of selective laser sintering (SLS) and shape deposition manufacturing (SDM) techniques. The platform used a two-wheel, two-motor design that delivers high mobility with low complexity.