Area 419 is always looking for ways to improve existing products when they are not developing new technologies. With the rapid growth in popularity of ARCA rails in precision rifle, they saw a need to improve this great dovetail technology to something that could be mechanically locked in place instead of just friction. If you have ever tried using a Barricade stop on an existing ARCA rail, you've probably also seen it slide under much pressure.Introducing the ARCALOCK Dovetail Rail System Rail FeaturesUniversal rail design is the same footprint as their previous rail. Serrated rail sides interface with their proprietary clamp design to mechanically lock it in place so no movement is possible. Serrations are not sharp, will not damage bags or your hands.58 Locking positions available on the 12" rail. These positions are engraved on the rail so you can easily adjust for known objects.Rail is backwards compatible with standard Arca accessories, but will not be locking without their cl...