The Shahed 171 Simorgh (sometimes S-171 and called IRN-170 by the US government[1]) is an Iranian jet-powered flying wing unmanned combat aerial vehicle (UCAV) produced by Shahed Aviation Industries.

[3] Its design is based on a reverse engineered American RQ-170 UAV captured by Iran in 2011 and modified to carry guided missiles.

[3] It is one of two Iranian flying wing UAVs based on the RQ-170, along with the Saegheh, a smaller version, with which it is often confused.

There are multiple unknown variants, one of which is modified to play the role of a UCAV armed with 4 missiles.

[12][13] Some sources report that a Shahed 171 may have been shot down in the February 2018 Israel–Syria incident, but the UAV was probably the very similar Saegheh.