Selected Handgun Detail

HK
Model HK4
HK Pistol HK4 .25 Auto Variant-3
Scale To:
Gun Dimensions Width:1.3-in
Length:6.2-in Height:4.3-in
Barrel:3.35-in Weight:18.3-oz
Variant 3 of 3
Gun Rankings
  • Power Factor (50 grain bullet)43450
  • Recoil Factor (50 grain bullet)0.66 ft-lb
  • Total Capacity9 rounds
  • ConcealabilityGood
  • Defense Factor46%
Gun Specifications
Type:Pistol
Caliber:.25 Auto
Action:blowback operated semi-auto
Trigger:double-action (DA/SA)
Safety:slide mounted decock/safety lever
Magazine:8-round
Frame:black anodized aluminum
Grip:brown checkered plastic
Sights:fixed blade and notch
Notes:First Variation
Manufacturer
Heckler & Koch GmbH
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About the Gun

The first pistol produced by the company, designated as the HK4 due to its modular frame design that allowed for changing the barrel, spring and magazine to accommodate four different calibers. The gun design was influenced by the Mauser Model HSc.

Production

Production of this firearm began in 1967 and continued through the early 1970s. As part of the initial design run, it reflects the earliest manufacturing standards and features of its series during that period.

Market value
Last updated: 7/3/2025

The MSRP for a new item was approximately $125 in the 1960s. Current market value for a used one in 95% condition is around $400-$500, depending on specific factors and market trends.

Cartridge Specifications
Cartridge: .25 Automatic
Alias: 6.35mm Browning
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Ballistics for This Gun
Selected Bullet Mass:50 grains
MV:869 ft/sec ME:84 ft-lbs
Analysis

This compact .25 Auto pistol offers a blend of practicality and performance for concealed carry or backup use. Its accuracy is commendable for its size, delivering consistent groupings at close range, ideal for self-defense scenarios. The ergonomics are well-suited for smaller hands, with a grip that facilitates a secure hold despite the diminutive frame. Reliability is generally solid, provided it is kept clean and maintained properly. However, maintenance can be a challenge, as disassembly requires patience and attention to detail. Parts availability is another concern, as sourcing replacements may prove difficult for some owners. The trigger pull is crisp, averaging around 5 pounds in single action, which aids precision. Felt recoil is minimal, typical of the low-powered cartridge, making it manageable for most shooters, though some may find the small grip less comfortable during extended sessions.

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