Yes, it is unique I believe. I was tickled when my daughter took my tang safety RSI in 6.5x55 for her deer rifle - but I needed a replacement. I had the components for a rifle build: flat bolt M77 action (it was missing the original barrel), a short action RSI stock, and my hankering for another 6.5mm rifle. The gunsmith did an excellent job on the rifle, as it shoots right at MOA accuracy with hunting bullets and the low powered glass.