I believe NEF is a new name for H&R, they've gone through many permutations in the last Century or so.
Many of us geezers started out with H&R singles, back around the time the last dinosaur toppled over(G). They were and are great utility shotguns, rugged, reliable,and inexpensive.
Downside, just one shot, and the triggers are both heavy and hard to get to to lighten.
The H&R is a good bargain, but I suggest some deep familiarization with the 870 first. One thing at a time...