Chinese SKS marked G4?

[johnskiold56]

No military triangle mark, 1.2 million range  Serial number then  "G4"  in a larger different typeface after the serial???

[running-man]

Commercial gun, likely a scrub & refurbish.  The G4 has no relevance to the S/N and was marked long after the carbine left the factory. 

Here are a few more in the "12" commercial series, some with suffixes, some without.  Note that they all don't have the same font or font spacing, so despite having similar S/Ns, they may not be related to each other at all:

[johnskiold56]

Thanks!  Figured it was a commercial mark.