This sling stud Picatinny rail attaches to your rifles sling stud and gives you exceptional stability. Designed specifically for attaching a Picatinny quick-detach bipod to your rifle, such as the famous Atlas Style QD Quick Detach* Bipods. Normally you would pay a lot more for this type of bipod attachment system with this quality. In addition, it is longer than other ones, as we designed it with 3 slightly oversized slots and will allow more types of quick-detach accessories to be installed. e.g Atlas QD* Bipod and torch mounts. Also, Longer length can avoid more possible interference. Our sling stud Picatinny rail will fit 99% of all rifles with a sling stud. We have designed it to be super easy to be installed by hand and we have designed the installation position on your rifle so that you can easily reach and attach bipods with ease. This adapter has been very successful for many hunters and long ranger shooters. It is also the back bone of our bipod and rifle torch mount systems. However, it will not work with non-QD bipods with two ridges. e.g Atlas Bipod Non-QD* versions without modification.