This was a quick little pet project to make moderator sound testing more convenient and accuracy testing easier when there is a couple feet of snow on the ground. It is pretty much what it says on the tin, using the sling swivel stud on an FX Crown and adapting that to an Arca Swiss rail interface. This example is entirely 3D printed, but for a 3.5x20mm brass pin which goes through the swivel stud. The clamping force from the tripod head holds everything together. A small window provides access to the front gauge…… assuming the clamp doesn’t obscure it.
This whole thing can be machined or 3D printed, and we’re offering up the 3D digital files if anyone wants/has use of them.
Why Arca Swiss, and why swivel stud? The Harris type bipods attach via a swivel stud, and are very light weight and durable. It is also lower-profile and less marring to use a swivel stud than a rail. Regarding Arca Swiss, they’re the manufacturer of arguably the best monoball tripod head, and in so doing set the standard for mounting clamps. Now most tripod heads use them. Manufacturers in the precision rifle industry are starting to pick up on this, and you’re seeing Arca rails more and more often on chassis systems. Oddly though, it seems a lot less common in the airgun industry.