Absolutely silent - Strike Industries Billet Ultimate Dust Cover

This dust cover is phenomenal! Easy installation without having to remove a bulky hand guard or deal with C clips. It also has an amazing adjustment system which really does help. My upper had a slightly higher lip than normal and the other cover had issues closing easily. With the SI cover a small flathead will fix the issues and perfectly tune it without even needing to remove it. To top all of this off the rubber pads that come with it dampen the sound practically 100%. No sharp clang, barely even a dull thud.