Selected Handgun Detail

Astra
Model 400
Astra Pistol 400 9 mm Largo Variant-1
Scale To:
Gun Dimensions Width:No Data
Length:8.9-in Height:No Data
Barrel:5.9-in Weight:39-oz
1 Variant
Gun Rankings
  • Power Factor (124 grain bullet)160828
  • Recoil Factor (124 grain bullet)4.59 ft-lb
  • Total Capacity9 rounds
  • ConcealabilityFair
  • Defense Factor70%
Gun Specifications
Type:Pistol
Caliber:9 mm Largo
Action:blowback operated semi-auto
Trigger:single-action (SA)
Safety:frame mounted manual safety
Magazine:8-round
Frame:blued carbon steel
Grip:checkered wood
Sights:fixed blade and notch
Notes:AKA Modelo 1921
Manufacturer
Astra-Unceta y Cia SA
More Info
About the Gun

The Model 400 is a large, heavy all-steel single-action blowback service pistol with Astra’s tubular slide, a concealed hammer, a grip safety, and a frame-mounted thumb safety that also locks the slide. Standard guns are blued, with checkered wood grips and fixed blade-and-notch sights. It is the full-size 9 mm Largo companion to the compact Model 300.

Production

Production ran from 1921 through 1950.

Market value
Last updated: 9/9/2026

MSRP at production was around $50. Current used market value for examples in good to very good condition ranges $450–$750.

Cartridge Specifications
Cartridge: 9 mm Largo
Alias: N/A
More Info
Ballistics for This Gun
Selected Bullet Mass:124 grains
MV:1297 ft/sec ME:463 ft-lbs
Analysis

Astra introduced the Model 400 after Spanish army trials to replace the Campo-Giro. Pedro Careaga’s design was adopted in 1921 as the Pistola de 9 mm Modelo 1921 and issued to the army, Carabineros, prison service, and navy. It stayed the standard Spanish service pistol through the Rif War and the Civil War; the Guernica factory supplied Republican and Basque forces until 1937 and Nationalist forces afterward. About 106,175 were built. In 1941 Astra delivered roughly 6,000 guns to Germany in the 92,851–98,850 serial block; those pistols generally carry no Waffenamt, and marked examples should be treated with caution. Chamber and feed problems with German 9 mm ammunition on the long Largo chamber led directly to the shorter Model 600 in 9 mm. The Spanish Army adopted the Star Model A in 1946, but Astra kept the 400 in private production through 1950. Remaining military stocks reached the civilian market in the late 1950s and 1960s. Used guns are common as Spanish service pistols; documented German-contract examples in the accepted serial range bring more than ordinary issue guns.

User Rating
1 User Ratings
1 User Comments
User Comments

4 of 5 Stars
A fantastic service pistol for its time
By shernandez on 08 Dec 2025
When discussing the Astra 400, you have to look at it through the lens of its time. Although it is not without some flaws (Brittle firing pins that may be damaged when dry firing, heavy effort required to pull the slide due to its blowback design, strange appearance), it gained a great reputation for reliability and accuracy from those who used it. The ergonomics are not as awkward as they may seem, the trigger is crisp, and the caliber packs a punch while not recoiling too harshly. There is a lot of misinfo on these, particularly on the caliber of the Astra 400. Despite what old sporting catalogues and forum posts say, DO NOT run 9mm Luger, 380 ACP, .38 Super, or anything else besides what they are properly chambered for (9mm Largo and .38 ACP), for your own safety and that of the firearm. In all, these were fantastic sidearms for their time, and are underappreciated in the world of milsurp collecting.