Verified answer

A couple of these sling swivels and a sling.

http://www.amazon.com/Uncle-Tri-Lock-Sling-Swivels...

My $0.02:

Save your original stock in case you plan to resell it. In the used gun market, an old military relic like a Mosin Nagant is worth more the way it comes. If it only comes with an ATI stock, then it's devalued as a collectible and the plastic stock is worth less than the original. Sell it as a combo with the rifle assembled as it were when you bought it and a second stock to go along with it.

Nothing but a couple of Uncle Mikes whatchamacallits and a sling. I put one of my Mosin rifle actions into a Monte Carlo stock and it is a nice package. Be sure and save the wooden original stock as they are worth about a hundred bucks if you try to buy one. Also, with the wooden stock you can go to Amazon and order a nifty little ribbed rubber replacement buttplate that adds an inch and a half to the stock length and eliminates the slipperyness of the metal one.

Sling swivels to match the studs supplied. ('Uncle Mikes'?)

You big problem will be a decent set of sights to fit that old bird.

..lipstick on a pig, John. Sorry to annoy the m/n purists out there but I can think of better ways to P**S away money on a gun, than this....

cool