Dave, My damage to my R1 was similar, I repaired using Elmers Carpenter's glue and wood filler putty, sanded area and used Old English furniture polish and Tru-Oil. Looks better than I thought I could do myself. Hopefully yours also turns out OK.
Dave, what caused this breakage if I may ask?
My got damaged by falling off my work bench and hit the floor, the barrel was in the cocked down position.Damage looks almost identical.