The "Lew Horton edition" part is marketing. So is the "tactical" part.
Lew Horton is a distributor. Their "Edition" is a, phosphated, 18.5", 7 shot, rifle sighted, M870 Express. There's one on Gunbroker(auction ending at 2022 tonight) at $460 with no bids.
Otherwise, an 870 is an 870.