The basic design has been around since the early 90's when they were known as the Raptor rifle company. They were intended to be the least expensive bolt rifle on the market. And they succeeded.
They were only in business for a couple of years before they failed. But Charter Arms bought the rights to the design and made the rifle under their name for a couple of years before dropping them.
When Mossberg bought the rights to produce the rifle, they did a lot to improve QC and offered enough different versions of the rifle to appeal to a lot of different gun owners. And their timing was at about the time when there were a lot of other budget guns being offered.
I never cared for any of the versions, but by all accounts, they are decently accurate, and they fill a niche for a lot of people.