D-Ring for sling

This is a D-Ring to attach a sling to your nerf blaster or airsoft gun if the attachment points are not very good. There are two sizes of D-Ring Depending on the size of the attachment point. This requires an m3*20 bolt if you are using the big one or an m3*12 bolt if you are using the small one + an m3 nut no matter what size it is