Northwood Developments M77
- Category
- Carbine
- Barrel
- Not recorded
- Weight, empty
- Not recorded
- Introduced
- 1977
About
What it is, and why it matters
The Northwood Developments M77 is a Rhodesian 9x19mm blowback-operated pistol-caliber carbine designed by former RAF engineer Roger Mansfield and built in Salisbury (now Harare). Part of a modular system sharing a common receiver with the R76 pistol, it accepted four interchangeable barrels and either a collapsible wire or fixed wood stock, feeding from standard Browning Hi-Power magazines. Production versions were semi-automatic only as required by Rhodesian law, with only a handful of select-fire prototypes made for military evaluation.
One of the very few firearms designed and mass-produced in Rhodesia, the Northwood M77 was the brainchild of an ex-RAF engineer and cleverly borrowed Browning Hi-Power magazines so owners could feed it from an already-common pistol mag.
Physical dimensions, weight, and muzzle-velocity figures are not documented in surviving sources. About 2,000 carbines were built before Rhodesian production ended around 1980, with most remaining in-country and some reaching South Africa.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Northwood Developments
- Category
- Carbine
- Country
- Zimbabwe
- Status
- Discontinued
- Produced
- 1977 to 1980
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Blowback
- Firing mechanism
- Closed bolt
- Capacity
- 20
- Magazine
- Detachable box
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Steel
- Barrel
- Steel
- Stock
- Wood
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.
Modular receiver accepting four interchangeable barrels
Choice of collapsible wire stock, fixed wood stock, or no stock- Feeds from standard Browning Hi-Power magazines (13, 20, 30 round)
Browning-interchangeable magazine catch
Optional bayonet lug and clamp-on bipod on longer barrels
Standing
How it compares
This record has too few measurements to compare with others yet.
Answers
Questions about the Northwood Developments M77
What caliber is the Northwood Developments M77?
The Northwood Developments M77 is chambered in 9x19mm Parabellum.
How many rounds does the Northwood Developments M77 hold?
The Northwood Developments M77 holds 20 rounds, fed from a detachable box magazine.
Who makes the Northwood Developments M77?
The Northwood Developments M77 is made by Northwood Developments (Zimbabwe). It was designed by Roger Mansfield.
When was the Northwood Developments M77 introduced?
The Northwood Developments M77 was introduced in 1977 and discontinued in 1980.
How does the Northwood Developments M77 operate?
The Northwood Developments M77 uses a blowback action, and its firing mechanism is closed bolt.
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.
Provenance
Confidence in this record
60%
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/northwood-developments-m77' \ --header 'X-API-Key: your_key'{ "id": "northwood-developments-m77", "name": "Northwood Developments M77", "manufacturer": { "id": "northwood-developments", "name": "Northwood Developments", "countryCode": "ZW", "foundedYear": null, "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": "d121677c10037a2ebaa7db496a7cc3e9794916a51ef66514cee1a704a0436b0b" }, "category": { "id": "carbine", "name": "Carbine", "description": "Shortened rifles for close-quarters use" }, "country_of_origin": "RH", "year_introduced": 1977, "barrel_length_mm": null, "weight_empty_g": null, "action_type": "blowback"}