That is somewhat similar to the Sharps and Rem Rolling blocks that were used at Creedmoor for rifles while shooting at 1,000 yard range targets while lying prone on their backs with the barrel supported by their legs/knees insofar as the location of the rear aperture sight. Your custom stock must have taken you quite a while to envision and create and I commend you upon your creativeness, if that is a word. Where did you get the wood and the trigger guard aft of the grip frame? I am very curious to know how you accomplished that.
I am most impressed because in the 90's I converted a Remington Rolling Block #5 (smokeless) action in 7mm Mauser with a new .45-120 octagonal barrel, wood from Reinhart Fajen, a tangent rear sight, and a globe front sight for my Creedmoor rifle. It cost a pretty penny to produce and I sold it in 2000 to a guy who just had to have it for $1200, and I just may have broken even on the gun. Your gun is very much one of a kind, and I appreciate your time and vision.
Thanks for the photos, sir!
Regards,
Jim