does bottom mounted Bolt release require different stock inlet??

[Detritus]

What stock is in the top pic?

Per the B&C website that's the Bell & Carlson "Varmint/Tactical (Adjustable)" I've seen it sold using nomenclature similar to McMillan, ie refering to it as the "Varmint/Tactical A5".

Oh how i wish that one came in a Savage inlet, but currently it only seems to come setup for Remington and Howa.