"Full Description:\nArea 419 is always looking for ways to improve existing products when we are not developing new technologies. With the rapid growth in popularity of ARCA rails in precision rifle, we saw a need to improve this great dovetail technology to something that could be mechanically locked in place instead of just friction. Introducing the ARCALOCK Dovetail Rail System. <strong>*Please Note:</strong> Arcalock rails sold separately.<br />\n<br />\n \n\nFeatures:\n\u003cul>\n\u003cli>Clamping screw features two different thread pitches. The coarse 16tpi is used when no tension is on clamp, allowing rapid movement of the clamp. With high speed comes low torque though, so to counteract this as soon as the clamp sees tension it will switch to the 32tpi threads in the knob to give you extra torque when not using on an ARCALOCK rail.\u003c/li>\n\u003cli>1/4 Turn releases the clamp from the detents on the ARCALOCK rail for movement.\u003c/li>\n\u003cli>Knob/Screw design prevents the clamp from being able to fall apart if you loosen it too far.\u003c/li>\n\u003cli>Moving side of clamp is dovetailed on both sides to prevent tilt.\u003c/li>\n\u003cli>One Turn releases clamp to be removed from rail.\u003c/li>\n\u003cli>Proprietary two-stage screw design.\u003c/li>\n\u003c/ul>\n\nSpecifications:\n\u003cul>\n\u003cli>Clamp is backwards compatible with standard ARCA rails by removing the two pins, and will still work this way to give you infinite sliding adjustment on the ARCALOCK rail.\u003c/li>\n\u003cli>Barricade stop can either be standalone on the clamp using provided hardware, or sandwiched between an Atlas bipod. *Barricade stop does not work with Harris Bipods*\u003c/li>\n\u003cli>Clamp directly bolts to Atlas Bipods using their factory hardware (excluding the 2-screw bipods. QD and NC only).\u003c/li>\n\u003cli>Type III Hardcoat Black anodized clamp and Gold anodized knob\u003c/li>\n\u003cli>Screw is turned from 303 Stainless Steel\u003c/li>\n\u003cli>Clamp and knob machined in house from 6061-T6 Aluminum\u003c/li>\n\u003cli>Clamp Weight: 72.5 Grams\u003c/li>\n\u003c/ul>\n"