On the Remington 43 cal rolling block that I found in my father's basement, I cut-off the original barrel to ten inches then bored out the inside to half inch dia. I bought a new 3/4 inch 22 rf blank and turned-down the last then inches to half inch outside dia plus some shallow rings for the glue. Also made a hard bushing for the chamber area around the new barrel as there was still room from the large 43 cal chamber. I had to make the extractor from round stock than milled it, than I made the scope blocks. Also worked over the action and made a stock. Attachment 19937 Attachment 19938 Attachment 19939 Attachment 19940