Savage 110fpc-k 25-06

I will buy a new Savage 110fpc-k in 25-06 soon. Something puzzles me though. I seem to notice 3 different guns with the same part number. One looks like no accustock, one looks like accustock and detachable magazine, and one looks like accustock with no detachable magazine. Yet all have the same part number of 18611, I believe. How on earth do you know which rifle you will receive? Of course I want the accustock and detachable mag. Any idea why Savage has the same number with different description?

The only sure way to know is by calling Savage with the serial number. They will give you the build info. The hard part is getting the serial number off the box.
Savage does not always change the part number when they change configurations. For instance when they changed from stagger feed to center feed magazines they did not change part numbers.