Shopping it ius easy, delivering them without it be known is a bit harder now, that Israel monitors the Syrian Lebanese border as well as Sinai, from its Ofek satellites. I believ this is a.) a good-will gesture by Turkey in order not to be kicked out of NATO, as well as a hint that the two big non-Arab Islamist powers are actually in collision course, not poised to be allies forever.
Roadside bomb kills five border officers in western Iraq (AP)
from the article: Turkey to UN: We seized illegal Iran arms shipment en route to Syria