The P.38 is a semi-automatic pistol design, which introduced technical features used today in commercial and military semi-automatic pistols, including the
Beretta 92FS and its
M9 sub-variant. The P38 was the first locked-breech pistol to use a
double-action/single-action (DA/SA) trigger (the earlier double-action
PPK was an unlocked
blowback design, but the more powerful
9×19mm Parabellum round used in the P38 needed a locked breech design). The shooter could chamber a round, use the safety-
decocking lever to lower the hammer without firing the round, and carry the weapon with a round chambered. The lever can stay on "safe", or if returned to "fire", the weapon remains safely "ready" with a long, double-action trigger pull for the first shot. Pulling the trigger cocks the hammer before firing the first shot with double-action operation. The firing mechanism extracts and ejects the first spent round, cocks the hammer, and chambers a fresh round for single-action operation with each subsequent shot; all features found in many modern
handguns. Besides a DA/SA trigger design similar to that of the earlier
Walther PPKs the P38 features a visible and tactile
loaded chamber indicator in the form of a metal rod that protrudes from the rear of the slide when a round is chambered. , coded "byf 44" with matching
presstoff and leather holster The moving-barrel mechanism is actuated by a wedge-shaped hinged locking piece underneath the breech. When the pistol is fired, the barrel and slide recoil together, until the hinged locking piece drives down, disengaging the slide and arresting further rearward movement of the barrel. The slide continues its rearward movement on the frame, ejecting the spent case and cocking the hammer before reaching the end of travel. Unlike most autopistols which eject empty cases to the right, the Walther P38 ejects empty cases to the left. Two recoil springs on either side of the frame and below the slide, having been compressed by the slide's rearward movement, drive the slide forward, stripping a new round from the magazine, driving it into the breech and re-engaging the barrel; ending its return travel with a fresh round chambered, hammer cocked and ready to repeat the process. The hinged locking piece assisted breechblock design provides good accuracy due to the in-line travel of the barrel and slide. Initial production P38 pistols were fitted with walnut grips, but these were later supplanted by
Bakelite grips. Sheet metal grips were used for a time on pistols produced in France after the war, being called "Gray Ghosts" by collectors on the account of their distinctive parkerizing and sheet metal grips. Post war P1 grips were made of black colored plastic. ==Variants==