WHAT DOES REMINGTON 870 WINGMASTER 2 3/4 ONLY MEAN?

Would any of you Remington fellas understand how the earliest Wingmasters in comparison with kinds made later?This would be my to start with shotgun. I would like to use it for many clay capturing (I are aware that this is not the top shotgun for this objective but I wish to uncover if I'll like it right before paying out some huge cash on somethin