A John Martz custom Walther P38 conversion chambered in .45 ACP, featuring a distinctive extended barrel, brushed metal finish, and black grip panels. A standout custom pistol that blends the classic P38 profile with Martz’s specialized engineering.
This John Martz Custom P38 is a Walther P38-based custom pistol chambered in .45 ACP. Built around the classic open-top P38 profile, it reflects the distinctive approach John Martz brought to historic handgun platforms through extensive custom gunsmithing.
While the recognizable P38 silhouette remains, this example was reworked to accommodate .45 ACP rather than the platform’s original 9mm configuration. The design includes a distinctive extended barrel and modified slide and frame geometry, creating a notably different visual presence while retaining the core character of the original pattern.
The extended barrel is one of the defining features of the pistol. Finished in a satin steel tone, it lengthens the lines of the gun and gives the piece its standout profile. The metal surfaces show a brushed finish that complements the precise, purposeful look of the build.
Classic P38 design elements remain in place, including the slide-mounted safety/decocker and the open-top slide configuration. Black grip panels provide contrast against the matte steel appearance and maintain the familiar feel of the platform.
This custom Martz P38 brings together classic military design and American custom pistolsmithing in a highly distinctive format. It is an especially compelling piece for collectors interested in Walther P38 variants, custom conversions, and the work of John Martz.
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