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Walther P4 (Germany)
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Walther P4

Walther P4, a post-war police version of P38 with aluminum frame, shortened barrel and modified safety system

Walther P4

Walther P4

Walther P4

Caliber :   9x19 Luger / Parabellum
Action : DA - Double action
Length : 197 mm
Barrel length : 104 mm
Weight unloaded : 740 gramms
Capacity : 8 rounds
  Download Users Manual Download Walther P4 Users Manual

There were a couple of modifications of the P38, intended for police use, which appeared during the 1970s. The first was the P4, the first pistol to conform to new German requirements for police sidearms. Actually, the P4 was the P38 (or P1) with barrel cut back by 25mm (1 inch), fitted with an automated firing pin safety and decock-only lever. Early P4 pistols were actually made using P38 components, including slides, and thus were marked "P38 IV" instead of more common "P4".
Another, less well-known variation was the P38K (Kurz, for Short in German), made for some special users such as the KSK – an elite counter-terror unit. This was a P4 (rather than original P38) with the barrel cut down at the front of the slide, and it was intended for concealed carry. The front sight was mounted on the slide, unlike the full-size model. It must be noted that a similar model was produced in small numbers during WW2 for the Gestapo and other such organizations. Wartime Kurz P38’s differed from post-war version by having a slightly longer barrel with the front sight mounted on the barrel. However, the service life of police derivatives of the P38 was much shorter than of the military P1 – most P4 pistols were declared obsolete and sold as surplus during the 1980s, while the P1 served until 1995. The last commercial P38 pistol was manufactured in 2000.
While P38 pistols were in some aspects revolutionary in design and concept, their post-war P1 versions were less than popular in the Bundeswehr, deserving the unofficial description of "eight warning shots plus one aimed throw". Also, these pistols showed a typical German obsession for unnecessary over-complication of design – for example, the P38 pistol had eleven springs (mostly of very small size) – about twice that of the older P08 Luger pistol it replaced in service. It also had plenty of small parts and pins that were easy to lose during full disassembly, and a firing pin of intricate shape that easily broke.

The Walther P38K is short-recoil operated, locked-breech pistol. The barrel is locked to the slide using a wedge-shaped locking piece, which can tilt up and down below the barrel, while following the inclined surfaces on the frame. When the barrel and slide are in battery, the locking piece is in its upper position, and its lugs securely lock the slide to the barrel. Upon recoil, the locking piece drops down and out of the engagement with the slide, unlocking it and allowing it to recoil and complete the reloading cycle. Because of the short slide, the P38K has two captive return springs, located on either side of the frame and inside the slide. With time it was found that the aluminum frame developed cracks in the most highly stressed area, where the locking piece and barrel were slamming against it on recoil, so the frames of late production pistols were reinforced with the addition of a hexagonal cross-pin, made from steel. The trigger is double-action, with an exposed hammer and trigger bar (the link between the trigger and sear) unusually located outside of the frame at the right side. The standard safety also acted as a decocker, and was located at the left side of the slide. On the P4 pistol, the slide lever retained only the decock function and, once pressed and released, automatically returned to the fire position. P38K pistols were also fitted with a firing pin block safety. Magazines were single-stack, with the magazine release located at the heel of the grip. The sights were fixed. P38K pistols were also fitted with a loaded chamber indicator in the form of a small pin that projected from the rear of the slide, above the hammer, when a cartridge was loaded in the chamber.

How to field-strip (disassemble) Walther P38K:
1) remove the magazine by pressing the magazine release button;
2) check that the chamber is empty;
3) pull the slide all the way back and lock it there with slide stop lever;
4) turn the disassembly lever down and forwards (located at the front of the frame, on left side);
5) while holding the slide, release the slide stop lever and carefully ease the slide into battery, then push it forward and out of the frame;
6) turn the slide upside down, and push forward the small pin at the base of the barrel, this will unlock the barrel from the slide;
7) pull the barrel out of the slide.
Reassemble in reverse order.

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