This DartToys3D product hardens the Nerf ECS-10 Shoulder Stock. The Nerf ECS-10 Shoulder stock is a unique science fiction design that is a great addtion to a Nerf N-Strike Modulus rifle or to an airsoft gun (using the Airsoft TeleScopix adapter). But it's thin orange rails are too flimsy for practical use. This hardening brace clips onto the orange rail to stiffen the shoulder stock. One is sufficient for most applications, but use two to really stiffen it for competition use.
Airsoft and Nerf equipment used for illustration of this ECS-10 Shoulder Stock Hardening Brace are not included.