The RSA strap loop provides a leading suspension system for Magpul MS2 or MS3 and other clip-in systems. You can attach the RSA to any Picatinny 1913 rail.
The material used is nitrocarburized steel, which resists corrosion and mechanical wear. The product is very lightweight and undergoes stress testing. The loop has a very low profile. This makes the design discreet as well.