Just 2 hours ago a video got released on Liveleak. This video shows how Syrian rebels attack an checkpoint. The checkpoint armed with an Tank and around 8 soldiers(?) gets shot by heavy machine guns and it looks like grenade launchers have been used. The cameraman continues to say Allah Akbar which means Allah is greater during the video.
Dear people, I am no gun expert. If you know which weapons have been used by just seeing the bullets please let me know in a comment. I will update the article with the correct weapons.