20mm Vs Sewer Lid
This video tests the ballistic resistance of a thick sewer lid against various firearms. A 20mm practice round failed to penetrate, causing only minor surface damage. However, a 20mm tungsten armor-piercing round successfully penetrated the cast iron lid. A full-auto MP5 firing 9mm rounds also failed to significantly damage the lid, highlighting the effectiveness of the sewer lid's material against smaller calibers.









