In looking around the web I have found no evidence that Winchester Muzzleloading is going out of business.

U.S. Repeating Arms which is one of several companies that have licensed the Winchester name has closed it's New Haven, CT manufacturing plant and will not be building several of the Winchester models anymore but even that company is not completely out of business, just scaled back.

Winchester Muzzleloading is owned by BPI who markets the Winchester line of muzzleloaders under license from Olin who owns the Winchester name and ammo manufacturing. I also cannot find any info on the Apex being out of production. I have been happy with the Apex I bought my son and am impressed with the quality of the rifle.

If there is any verifiable info about them closing or discontinueing production that someone knows about I would be interested in seeing it.