After you refit your M1891 Carbine, the sights, or drilling and tapping for scope mounts will run up the bill far beyond the simple purchase of a modern rifle, in my humble opinion. If you are looking for a hunting arm, I suggest it will be both simpler and cheaper to allow your collectable M1891 Carbine remain 'as is' and purchase a modern sporting rifle for your hunting purposes. As information, the M1891 is considered a 'weak' Mauser action and not many calibers can be utilized within your carbine's action. I am a bit confused what your question is about a replacement barrel, etc.? Further, I do not understand the 'rebore to a compatible caliber?'Īs a very serious military arms collector, I will gladly field your questions once I fully understand what you want to do. You have a Carbine which is collectable as you state. I very much like the M1891 Argentine I bought a rifle in June 1961 in mint condition for $16.88 that resides in my vault. Welcome to the Forum I see this is only your fifth post.