First, you didn't break that so don't worry. When you get the parts you'll see they go together just the way that one came apart. By the way, that's a JapaneseType 44 Cavalry Carbine...just a bit hard to find. One just sold on Icollector for $1900USD... Japanese Type 44 Cavalry Carbine with Sling and Bayonet
The guys will be here shortly to talk about it...