一些稀有枪械
Roden’s Patent Improved Snider: An Interesting and Rare Early Locking Breech
Firearm Showcase: Winchester Mystery 1966 Underbarrel Grenade Launcher Cody Firearms Museum
Detail of the Cook SMG. M.Sgt. L.C. Cook was a bit of an odd dude, who at one point claimed the 10″ barrel of his submachine gun would double the velocity produced by the 1911 handgun!
And then we have this rather unusual contraption, labeled only as “Prototype Machine Pistol”. It appears to use pistol magazines (they look like P-38 mags to me) arranged in series, instead of a conventional stick magazine:
Here’s an interesting one, a High Standard Gas Operated Carbine, mislabeled as a Winchester carbine prototype:
A prototype G43, built in 7.92×33 and using 30-round StG magazines: