Why would the rifling be gone?

[MarkItZero]

Especially if the pistol is nearly new?

https://www.ows-ammo.com/zastava-m57-pistol-rare-officer-honor-guard-model-nickel-finish-7-62x25-grade-2

Now I need to go look at my Tokarevs closer

 

[mtptwo]

Shooting the heck out of it with steel jackets would be my guess. about 7k to 10k rounds will do that, assuming that they barrel isn't overly soft.

 

[knockonit]

corrosive ammo

 

[Crippledtrigger]

Especially if the pistol is nearly new?

https://www.ows-ammo.com/zastava-m57-pistol-rare-officer-honor-guard-model-nickel-finish-7-62x25-grade-2

Now I need to go look at my Tokarevs closer

Prior to 1970 production.

Re arsenal for some parade function?

 

[Ballistic Therapy]

With no rifling , how can it be " Excellent to near-new condition " ?

Just a guess , but I would think he swapped out the barrel.