Need to figure out what barrels I got with a used Impact MK2

[DavesMk2]

I recently bought a used FX Impact MK2 25 cal from Airguns of Arizona. It came with a second barrel.
I suspect the previous owner bought a slug barrel but it is anybody's guess as I can't find any markings on it at all.

Does anybody have any way I can identify what the barrel is or know where the secret markings are?

 

[Healthservices]

Is this a barrel with a liner system? If so I would start with tearing it down and finding the twist rate.

Allen

 

[Revoman]

There are no secret markings, not too bright by FX. I have seen some videos showing to put a piece of tape on a Dewey rod and count the times that it turns 360°, giving you a close proximity of the actual twist rate. Then you can look at the twist rate chart and see which liner is close to your count.

 

[DavesMk2]

Thanks. Can't imagine why there isn't at least a part number etched on it.

 

[Revoman]

"Can't imagine why there isn't at least a part number etched on it."
No kidding! All of the new ones of late now have what appears to be laser etched/printed information along the length of the liners. At least they're better now!
mike