"Forced match" is what happend when the rifle was dissasembled, its parts replaced, and it was brought into specifications for reissued or storage, after Its been rearsenaled
This brought old and broken rifles back into service after the arsenal redid them. during peace, after WWII.
The Finns did the same thing, but didnt usually go through the renumeration stamping, and the mismatched nubers are referredto as "Finn Matched" Mosins.
The "RGuns" snipers are Ukrainian sniping referbs from the factory, stored and still awaiting WWIII, the others (cheaper) are made up here in the US.