Actually, I like this part of the list a lot better. The Martini Henry came to mind, but I have to admit I have never shot one. There is something very manly about standing shoulder to shoulder in the hot sun giving volley fire to the wogs, while Color Sargent Bourne steadies me with his gentle admonitions.
The M1919 is definitely manly. However, there's also the BAR, the water-cooled Browning , and the Ma-Deuce. I believe any weapon that occasionally needs you to pee on the barrel to keep it from overheating is a very masculine sort of package. Let's face it: full-auto is manly. Belt fed is manly. Crew served is manly. The BAR? Manly.
The 1895 Nagant? Turkish Mausers? Come on! Somebody has been overusing their C&R license if you ask me.
Mausers are manly, but if you get to arguing Mausers, just about every bolt gun today owes its lineage to the Mauser. I would exclude the Swedish Mausers-- great rifles, but not very manly. The K98 is especially manly if you figure that some of my relatives were trying to use them against guys armed with M1 Garands.
The FAL is manly. I'm a big guy (think John Wayne gone to seed). Firing one of these puppies full-auto offhand rocked me back like I was a stripling.
On the other hand, the .600 Overkill is not manly. Insane? Yes. You can bag the largest of game with a lot less. 375 H&H? Manly. .416 Rigby? Manly. The .600 Overkill is in the same insane range as the 4 GA punt gun, and the German anti-tank rifle. I like my collar bone in one piece, thank you.