Actually Hankins has a base SML using a Boyds stock. Pillar bedding is pretty much mandatory with that stock. Stocks like McMillain it isn't required since they come with ether bedding blocks or pillars already.

He stocks barrels and actions as far as i know. How many really isn't relevant in defining custom vs production. He appears to have settled on Brux for the most part now and uses Rem700 actions for his standard rifle.

Does UF still stock Howa 1500 actions and the barrels for them?

NULA has used a Douglas barrel for as long as im aware. They have used the same action for the model 20 aka M209 since day 1.

So by your definition its a production rifle if bought in the standard configuration. You would need to include the Gunwerks rifle too with that broad of a definition.

Only available in 50cal and the options are very limited. Fluting, stock pattern, finish and scopes

Calling this $7000 ML a production rifle is without a doubt a sever stretch of the term.