Hammers and sights don't change the basic design - "Cosmetic changes". The internals of most 1911s are close enough to JMB's original design to satisfy my purist desires.
Browning's 1911-380, however, uses a linkless design. Now that changes it to a 1911'ish pistol instead of a true 1911. Kinda ironic that Browning's own "1911" isn't.
