DLOC-S Harris swivel bipod replacement attachment. This Patent Pending replacement upper for Harris swivel bipods was developed to facilitate attaching a Harris swivel bipod to a Picatinnay rail. This system fully complies with the current "no tools, no levers" request that we have received from the Military. The DLOC-S and all other pending DLOC systems offer connectivity like no other system manufactured. With the use of the DLOC system you will get 100% full connectivity to both sides of a Picatinnay rail along with full connectivity to the top portion of a rail system. We took the system even further by installing several recoil lug pins that hold even further in the cross slots of a rail. Attachment is very simple. Push the knob in towards the unit opening the clamping area and than attach in 1.5 seconds with 15 pounds of pressure. To fully lock the system in place, turn the knob 4 turns and the DLOC simply won't come off until you decide to quickly remove it. Proven not to damage any Picatinnay rail systems whatsoever. 6061 T-6 Aluminum Type III hard coat anodize. All Patent Pending DLOC systems fully comply with the new NATO STANAG 4694 (NAR) rail requirements.