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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
Produced:1967 - 1970
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
More Info
Gun Value
MSRP:No DataUsed Est:$725.00
Last Update:8/28/2023
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.

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

This cartridge was introduced in the United States along with the Browning-designed, Colt manufactured 'Vest Pocket' pistol. Also referred to as the 6.35mm Browning, this semi-rimmed centerfire cartridge has fairly high velocity for such a small size. However, the energy it delivers at any range is quite low. This, combined with the full metal jacketed bullet, adds up to a very poor stopping or killing power on anything. The .25 ACP is not powerful enough for hunting anything but pests, nor is it adequate for serious self defense. However, the .25 auto caliber pistols are popular because of their small size and low cost.

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