We can hang 40 pound dumbbells from the end of it and swing them around with no signs of bending. Under controlled laboratory tests the handguards can support a force of 90 pounds in any direction, and 600 pounds along their length more than even extreme users require. We field test every handguard configuration, firing thousands of rounds in tortuous conditions, then bring them back to the lab and inspect there are no flaws nor slowly developing cracks. Dozens of iterations have led to the current braid that we use. The resulting high-strength design is unique enough that it's covered by a US patent!