Trejo Modelo 1-A
- Category
- Pistol
- Barrel
- 75 mm
- Weight, empty
- 620 g
- Introduced
- 1952
About
What it is, and why it matters
The Trejo Modelo 1-A is a compact .22 Long Rifle blowback-operated semi-automatic pocket pistol produced in Mexico by Armas Trejo of Zacatlan, Puebla. It is the semi-automatic-only version of the select-fire Trejo Modelo 1 machine pistol, retaining the same small steel frame, 75 mm barrel and eight-round detachable box magazine but omitting the full-automatic capability. Loosely derived from the Colt Model 1908 vest-pocket design, it was a widely sold civilian handgun in Mexico from the 1950s through 1970.
The parent Trejo Modelo 1 is often cited as one of the smallest machine pistols ever made; the Modelo 1-A was the tamer, semi-automatic-only sibling created so the design could still be sold freely on the Mexican civilian market.
The Modelo 1-A was offered as a semi-auto-only alternative after the select-fire Modelo 1 drew scrutiny for being a readily concealable machine pistol. Trejo produced an estimated 80,000-100,000 pistols across all models before the original run ended around 1970; production later resumed under Industrias Trejo de Zacatlan.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Armas Trejo S.A.
- Category
- Pistol
- Country
- Mexico
- Status
- Discontinued
- Produced
- 1952 to 1970
- Variant of
- Semi automatic only
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 75 mm
- Overall length
- 160 mm
- Weight, empty
- 620 g
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Blowback
- Firing mechanism
- Hammer fired
- Trigger
- Single action
- Capacity
- 8
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Steel
- Slide
- Steel
- Barrel
- Steel
- Stock
- Wood
- Finish
- Blued
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 320 m/s
- Muzzle energy
- 130 J
- Effective range
- 25 m
Trajectory
What the round does downrange
Solved from the muzzle figures and the bullet. The dashed rule is the effective range on the record, and the crosses are the steps the solver returned.
No load solved for this record yetThe flight path is computed from a cartridge and a bullet. This record has no ammunition filed against its chambering, so there is nothing to solve.
Features
What it has
What the record lists as fitted, drawn from the catalogue.
Compact frame
Fixed sights
Standing
How it compares
Each figure against the firearms of the same type and cartridge that record it, or of the same type where that cartridge has too few. Positions are read to the nearest tenth.
| Measurement | This firearm | Median | Position |
|---|---|---|---|
| Empty weightAmong 151 .22 Long Rifle pistols | 620 g | 900 g | Lighter than about 70% |
| Overall lengthAmong 144 .22 Long Rifle pistols | 160 mm | 241 mm | Shorter than about 80% |
| Barrel lengthAmong 155 .22 Long Rifle pistols | 75 mm | 140 mm | Shorter than about 90% |
| Magazine capacityAmong 156 .22 Long Rifle pistols | 8 | 9 | Holds fewer rounds than about 60% |
Answers
Questions about the Trejo Modelo 1-A
How much does the Trejo Modelo 1-A weigh?
The Trejo Modelo 1-A weighs 620 g (1.37 lb) empty.
What caliber is the Trejo Modelo 1-A?
The Trejo Modelo 1-A is chambered in .22 Long Rifle.
How many rounds does the Trejo Modelo 1-A hold?
The Trejo Modelo 1-A holds 8 rounds, fed from a detachable box magazine.
How long is the Trejo Modelo 1-A?
The Trejo Modelo 1-A is 160 mm (6.30 in) long overall, with a 75 mm (2.95 in) barrel.
Who makes the Trejo Modelo 1-A?
The Trejo Modelo 1-A is made by Armas Trejo S.A. (Mexico). It was designed by Gabriel Trejo.
When was the Trejo Modelo 1-A introduced?
The Trejo Modelo 1-A was introduced in 1952 and discontinued in 1970.
How does the Trejo Modelo 1-A operate?
The Trejo Modelo 1-A uses a blowback action, and its firing mechanism is hammer fired.
Compatibility
Which parts fit this firearm
Studio
Every part that mounts on this, resolved
Not a list the maker typed out: the answer comes from the mounts this firearm exposes and the interface each part needs, so it stays right when either one changes.
- Every part that mounts on any firearm in the catalogue
- Interface standards, platforms and fit overrides
- The same answers through the API and the MCP server
Requires a signed-in GunSpec account on the Studio plan. The answer is computed per part, so it is not part of the public record.
Provenance
What the record holds
Every figure above was taken from one of these pages. The confidence reflects how much of the record came from a page a claim can be checked against.
In service
- Mexican civilian market
- Mexico
Provenance
Confidence in this record
62%
Stockists
Where to buy
Offers link straight to the shop. GunSpec never takes the order.
No shop has listed this firearm yet
Stock and prices come from the shops themselves. If you sell this firearm, you can list it and it appears here.
List a firearmMCP
Ask an assistant about it
The same record, reached the way a person asks for it rather than the way a program does.
Ask GunSpec
Works with
Point an MCP client at GunSpec and it answers from the catalogue rather than from memory. A free key covers the read tools.
API
The call that returns this record
The same fields, in the same units, from the same endpoint the page reads.
curl --request GET \ --url 'https://api.gunspec.io/v1/firearms/trejo-modelo-1-a' \ --header 'X-API-Key: your_key'{ "id": "trejo-modelo-1-a", "name": "Trejo Modelo 1-A", "manufacturer": { "id": "trejo", "name": "Armas Trejo S.A.", "countryCode": "MX", "foundedYear": 1948, "website": null, "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-07-19 22:59:14", "updatedAt": "2026-07-19 22:59:14", "version": "37f3f8582a5601c9c6b07074aeeee57346ea2bb4375db40eeceb856f0bdbbf26" }, "category": { "id": "pistol", "name": "Pistol", "description": "Handguns designed to be fired with one or two hands" }, "country_of_origin": "MX", "year_introduced": 1952, "barrel_length_mm": 75, "weight_empty_g": 620, "action_type": "blowback"}