It's a muzzle loader.
For the first time since the National Firearms Act (NFA) was created in 1934, civilians can enjoy suppressed shooting in all 50 states with SilencerCo's latest innovation: the integrally suppressed Maxim 50 muzzleloader. In addition, this product can be purchased right now on the web with no regulation (no 4473, no $200 tax stamp, no photographs, and no fingerprints) and be shipped immediately to the customer with few exceptions.
WHY DON’T I NEED A TAX STAMP?
The BATFE defines a silencer as a “device for
silencing, muffling, or diminishing the report of a
portable firearm...” By that definition, a silencer is
only a silencer if it can attach to a firearm.
The Maxim 50 is built on the base of a Traditions™
Vortek Strikerfire Muzzleloader. Muzzleloaders are
not considered firearms by the BATFE, but are
instead antique firearms, a definition and difference
that is very distinct.
Because of this, a moderator that is permanently
affixed to a muzzleloader is not legally defined as a
silencer, since it does not attach to a firearm.