Where do you think they got those missiles?
Timber Sycamore is the codename of a covert operation officially authorized by Obama in June 2013 to train and equip the anti-Assad rebellion, but which actually started in October 2011, when the CIA was operating via Britain’s MI6 to avoid having to notify Congressthat it was arming the rebels in Syria. Originally, the CIA and MI6 (the British foreign intelligence service) set up a rebel arms supply network in Syria from Libya — a plan that involved the Saudi, Qatari and Turkish intelligence services.
Ultimately, Donald Trump decided to phase out this operation in early summer 2017. This was a major setback for the CIA, as the US President was thereby conceding the defeat of the United States and its partners in the war against Syria and its Russian, Iranian and Lebanese allies.
https://www.zerohedge.com/news/2019-04-22/how-cia-allies-helped-jihadists-syria-french-covert-ops-expert-exposes-new-details
The K1 rockets were also 107 mm., had lot number 570, made in 2016. They were 18 kg. and, in handwritten notes their “R. No.” was 3965.
https://www.jpost.com/middle-east/photos-show-that-rockets-used-against-the-us-were-shipped-to-hezbollah-612400