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Figure 20: A Bergmann-style falling locking block/inline action.
will drive the barrel forward, which military use. The Beretta 92 uses a
drives the Y block. The track in the Y Walther-style falling locking block ac-
block forces the block upward, engag- tion. The semi-automatic pistol cham-
ing the lugs of the block to the lugs bered in 9x19mm NATO was adopted
on the slide and locking the chamber. by the U.S. military, replacing the .45
caliber 1911. The Arsenal Firearms
Both system designs are fairly old,
Strike One uses a Bergmann-style
with the Bergmann system being over
action. The Strike One is chambered
100 years old and the Walther sys-
in a variety of calibers, including
tem being nearly 90. The pistols that
9x19mm NATO, and has found use
employed these systems have become
with Russian Special Forces.
somewhat of a novelty. The Bergmann
M1910/21 is a semi-automatic pistol › Rotating Barrel – The rotating barrel
chambered in 9x23mm Bergmann short recoil action gets its name from
(9mm Largo) that began sales in 1910. the fact that the barrel will rotate to
The Walther P38 is a semi-automatic lock and unlock the chamber. The
pistol chambered in 9x19 Parabellum rotating barrel action is similar to the
that was designed in 1938. inline action in the fact that the barrel
moves in line with the bore’s axis but
Both systems have seen a revival with
is different in the manner in which
modern pistols and both have found
the chamber locks. The rotating barrel
95