That isn't just mud. It's mud, straw, stone, clay and timber. Those walls are thick. You're not getting 7.62NATO through it. At least not from any distance.

Check out the thickness of the walls. Earth is very good at stopping bullets. Which is why everyone uses sandbags








Here is a video of clay bricks just stacked together in a form of a wall. There is no mortar, no mud, no straw or timber. They are dry clay bricks and the thickness of the "wall" is the length of one clay brick. Guys look like they are 25 - 50 yards away. Out of 20 AK rounds one managed to get through a seem but there was no damage to the other side. 4 rounds of 45-70 only made a dent.

The Compressed Earth Block Bullet Proof Test - YouTube

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