Remember what the mill is. First and foremost it is a work around to the state not issuing dealer licenses to people out of their home. In most states you can have kitchen table FFLs that do most of their business online and a small amount at their "kitchen table". You CAN get an FFL out of your home. You cannot get a MA dealers license. Even if you are 100% online sales, not having a MA dealers license is an issue since that is what grants you the exemption from the AWB and magazine capacity limit. Who in texas wants a glock 19 with 10rd mags? So the Mill gives people an address to conduct business in person and receive their MA dealers license. If they are 100% online they just do everything from home like they wanted to in the first place. They keep an electronic bound book so they have it at their place of business but can also transact FFL to FFL activity from their home. All legal and what the majority of Mill FFLs do. They come in occasionally for FTF transactions.
Second is you have people doing serious retail. That is not a large list though it is growing. This is not anyones full time job. Most people have something else they need to do during regular business hours so their shop hours are weekends or evenings or both. I have posted before on who the high volume retail shops are
Dean Safety (me) Wed 2-8, Sat 9-2, Sun 2-6 (google maps will always be up to date on my hours)
Maga Arms Wed 4:30-8, Sat 9-2, Sun 2-6 (his website and google maps are up do date with hours)
Newtech R&D Wed 3:30-8, Sat 9-2
Defensive Dynamics Wed 3-6, Sat 12-3 (google maps has good hours)
Custom Defense Solutions Sat 10-5, Sun 12-5, M-Th 6-8 (google maps has good hours)
Those 5 shops likely cover 80%+ of the actual retail done at the Mill
There are a number of other shops that also do retail but may not be as well established or I do not know their hours (or if they have regular hours)
Minuteman Armament (been there longer than most, but sometimes steps away to race motorcycles)
Hyetech Armament
SHTF Arms
Seneca Arms
Pathfinder Armament
Battle Road Firearms
I have definitely left off some that do a small mount of retail or are up and coming. Some of the ones I listed have hours posted on Google Maps
You also have full one stop training available from
@EddieCoyle of Mass Reloading. He is also the landlord to the majority of the small FFLs at the mill