U.S. Patent No. 1,391,496This patent drawing does not show the “tail” which appeared on many early prototype breech
U.S. Patent No. 1,401,552Shows the cam extractor with spring& plunger that appears on early prototypes.
Two views of a prototype breech blockwith tailpiece, clearly showingthe cammed extractor and tail.
Interim Breech Block, shown upsidedown, with cartridge guide lug clearly visible (top right).
Production Breech Block, with nocartridge guide lug, and showing ashortened, integral tail, just like theinterim
Interim Breech Block, showing production-type spring steel extractorand cartridge guide lug.
Copyright 2007by Ed Buffaloe.