My mentor, Bob Walden got on a osage orange kick a few-really many -years back, made a couple long bows, and at least 1 Southern Mtn Rifle,iron mounts,in flint..
It is a bit heavy,but I carried it for several days deer hunting back then,and didn't mind the weight.Course, back then I was a heavy truck mechanic, and a 8-9-10 lb rifle twernt nuthin.
Makes for a swell looking gun when it ages, next time I am at his place I will get some pics,etc.
It can be done, and is a unique looking stock. Looks like fresh outta the hills of Arkansas. Dave F