• The Syrian Democratic Forces, a US partner in Syria, downed an MQ-9 Reaper drone.
• The incident shows the SDF has acquired air defenses of some sort.
• It's very possible that the SDF downed a low-flying Reaper with a shoulder-fired missile.

America's ally in Syria accidentally shot down an advanced US drone, suggesting these Kurdish-led forces have acquired some kind of air defenses.

A $30 million MQ-9 Reaper drone wasn't the only victim. A day later, the Syrian Democratic Forces — who partnered with the US to fight the Islamic State in Syria a decade ago — purposely shot down a Turkish drone.

A US official confirmed to Defense News that the SDF misidentified the MQ-9 as a threat on December 9 and shot it down, without specifying what kind of weapon was used; the SDF hasn't publicly acknowledged the incident. However, the SDF did release footage purportedly showing its forces shooting down Turkey's Aksungur drone.

"The SDF would need more capable air defense systems than older MANPADs (man-portable air defense system) like the Strela-2 to shoot down an MQ-9 Reaper unless the drone was flying far below its typical operating ceiling, possibly due to mission requirements or technical issues," Freddy Khoueiry, a global security analyst for the Middle East and North Africa at the risk intelligence company RANE, told Business Insider.

A Reaper drone has a 66-foot wingspan and can fly up to 50,000 feet in altitude, beyond the range of shoulder-fired Strela-2 missiles. The remotely piloted aircraft frequently carry Hellfire ground-attack missiles.

"A SHORAD (short-range air defense) or medium-range radar-guided SAM (surface-to-air missile) system would be required to effectively engage a Reaper drone operating at its standard altitude," Khoueiry said.

It is more likely that the SDF has shoulder-fired missiles due to their proliferation, which also have the benefit of being harder to spot than truck-mounted missile launchers. If the MQ-9 was downed by a MANPAD, it suggests it was flying very low, Khoueiry said.

The Aksungur is a much larger and more advanced drone than Turkey's widely exported Bayraktar TB2, but it is not in the same league as the American MQ-9.

"Aksungur drones are capable, 'middle-class drones' that are typically used for intelligence, surveillance, and reconnaissance, although increasingly modified to carry weapons," Nicholas Heras, senior director of strategy and innovation at the New Lines Institute, told BI.

Syrian soldiers abandoned their bases and weapons stockpiles during the dramatic fall of President Bashar al-Assad's regime in early December. Israel has already moved in and bombed large quantities of them. Turkey has also moved to prevent the SDF from capturing weapons. Turkish intelligence destroyed 12 trucks with missiles and other heavy weapons in the northeastern Kurdish city of Qamishli, and Turkish drones targeted abandoned tanks, armored vehicles, and rocket launchers strewn across northeast Syria.

"It is unlikely that the SDF captured and were able to quickly operationalize Syrian regime air defenses within the past week," RANE's Khoueiry said. "Furthermore, Israeli strikes have significantly degraded such systems across Syrian territory, making it even more difficult for a US-backed militia to acquire and effectively operate them."

Turkish media reported earlier this year that US troops in northeast Syria were training the SDF how to use the AN/TWQ-1 Avenger short-range air defense system, which fires Stinger missiles. However, sources in Syria cited by the UK-based Syrian Observatory for Human Rights war monitor said only US troops operate the Avengers, which protect their bases against Iran-backed militia drone attacks.

"The challenge for the SDF to use systems such as the SA-2s (Soviet-made S-75s) or Avengers is that these anti-air systems require a logistical network to operate that is cumbersome for a non-state actor, especially if that non-state actor doesn't have accompanying anti-air capabilities to protect those systems," Heras said.

Ceng Sagnic, chief of analysis of the geopolitical consultancy firm TAM-C Solutions, believes it is possible the SDF is "independently operating" some air defenses in Syria.

"However, it should be noted that Kurdish groups have long had access to short-range air defense missiles, particularly those acquired from the black market and not NATO standard," Sagnic told BI. "There is also a possibility that an operator of one of these systems got lucky that day."

"In any case, the incident demonstrates the readiness of Kurdish groups in Syria to respond to drone operations, especially those conducted by Turkey," Sagnic said.

The Kurdistan Workers Party, commonly known by its PKK acronym, had Strela-2 missiles as far back as the 1990s and shot down two Turkish helicopters over northern Iraq in 1997.

The Middle East Eye news outlet reported earlier this year that Iran had transferred air-breathing anti-drone loitering missiles to the PKK. One such munition purportedly brought down an Aksungur over Iraqi Kurdistan in May. Iran-backed Hezbollah in Lebanon and the Houthis in Yemen have used the Iranian-made 358 missile to shoot down Israeli and American drones, including a number of MQ-9s.

It's unclear if the SDF — whose main Kurdish component Turkey charges with inextricable PKK links — acquired such a system.

"The claim that Iran supplies the PKK (and, by extension, the SDF) with a significant number of anti-drone missiles is highly questionable," Sagnic said. "Only a consistent pattern of successful anti-drone strikes by the SDF in the near future could indicate enhanced capabilities by the Kurdish group, and a single drone interception is not sufficient proof."

"However, there have been at least two reported interceptions of Turkish drones over northern Iraq in recent months, suggesting that Kurdish groups are adapting to the so-called drone wars, though their continued success remains uncertain."

Paul Iddon is a freelance journalist and columnist who writes about Middle East developments, military affairs, politics, and history. His articles have appeared in a variety of publications focused on the region.