Quote Originally Posted by JimF View Post
How does a "carbine frame" differ from a "rifle frame"?

Like a trapdoor receiver, I thought these receivers were all the same!
The two receivers vary only in their date markings - "1898" for rifles, "1899" for carbines. The importance of such a distinction escapes me, but it obviously mattered to the OD at the time. Actually, when you come to think of it, that fetish is actually a huge (if unintended) boon to the collectors of today, by exposing any number of "incorrect" pieces now offered for sale.