A big problem with SB15 is that it effectively creates monopolies on replacement parts.
A gun appears to lose its Roster status if modified, even if identical replacement part(s) of equivalent quality/behavior/tolerances were dropped in.
I don't think a rostered Colt 1911 using, say, a replacement Wilson combat or other quality 1991 trigger or hammer or barrel would be regardable as the same gun that was tested/Rostered. [A separate issue may involve Harrott-like listing criteria, however - and that 'listing' (Rostering) is 'good enough.]
This is kinda like saying your GM car's emissions warranty/certification ability to be resold in CA being controlled by required use Delco oil filters, radiator hoses, etc. - but if you buy them from another vendor, your car can't be sold in CA. That'd effectively segment out a nice guaranteed monopoly in repair/warrant parts for Delco. Perhaps some Magnussen-Moss issues and certainly Berkey v Kodak-relevant matters pop up here relating to SB15.
CGF Board Member / NRA Benefactor Life Member / CRPA life member
No postings of mine here, unless otherwise specifically noted, are
to be construed as formal or informal positions of the Calguns.Net
ownership, The Calguns Foundation, Inc. ("CGF"), the NRA, or my
employer. No posts of mine on Calguns are to be construed as
legal advice, which can only be given by a lawyer.