A possible concise summary is:
The video is about testing different firearms in a mud environment to see how they perform. The narrator and his assistant use various rifles and pistols, such as the AR-15, the AK-47, the AUG, the SCAR, and the M14. They first test them with the dust covers closed and then with them open. They find that most of the weapons work well, except for the M14 and the FAL. They are surprised by how well the AR-15 variants do in the mud, and they conclude that training is more important than arguing about which weapon is better.
Here are the key facts extracted from the text:
1. The text is a transcript of a video where the speaker tests different guns in the mud.
2. The speaker performs two tests: one with the dust covers closed and one with them open.
3. The speaker finds that the AR-15 type systems perform very well in the mud, especially the block 2 and the SR-15.
4. The speaker has some malfunctions with the AKs, the FAL, the M14, and the Galil.
5. The speaker recommends training with the guns and not arguing on the internet.