Profile
- Origin
- Taiwan
- Built by
- 205th Arsenal
- Type
- 9x19 mm submachine gun
- Service note
- Developed in the 1980s and reported in service from the early 1990s
- Designer
- 205th Arsenal / Combined Service Forces
- Designed
- 1985
- Produced
- Reported from 1992
Infantry Weapons
T77 submachine gun
Also known as
- Type 77 submachine gun
- T-77 submachine gun
- T77 SMG
- T77A1
- T77 chongfengqiang
- T77衝鋒槍
- 205th Arsenal T-77
- Hsing Hua Arsenal T77
The T77 is a compact Taiwanese 9x19 mm submachine gun developed by 205th Arsenal for military-police, special-unit, and close-protection use. Open references describe it as a MAC-11 and Cobray M11/9-influenced select-fire weapon with an open-bolt blowback action, folding stock, pistol-grip magazine well, and high cyclic rate; no directly sourced conflict-use row is attached to this record.
Profile / Specs
Specifications
- Cartridge
- 9x19 mm Parabellum / 9 mm Luger
- Action
- Open-bolt simple blowback; select-fire
- Overall length
- 610 mm with stock extended; 335 mm with stock folded
- Barrel length
- 215 mm
- Weight
- About 2.8 kg empty
- Magazine
- 15- or 30-round box magazines
- Cyclic rate
- About 1,200 rounds per minute; some references give a 1,200-1,500 rpm range
- Effective range
- About 150 m
- Sights
- Protected front post and flip aperture rear sight
Design Notes
Public sources describe the T77 as a compact select-fire submachine gun influenced by the Ingram MAC-11 and Cobray M11/9 lineage, but adapted with Taiwanese production details for Republic of China service.
Operating system
Open-bolt simple blowback action with a wrap-around bolt and fixed firing pin.
Controls
Select-fire operation with semi-automatic and automatic fire; Modern Firearms places the selector on the left side and the manual safety near the trigger.
Handling package
Stamped-steel receiver, magazine in the pistol grip, protected front sight, flip aperture rear sight, and a right-folding metal stock.
Variants
Open references use T77, Type 77, and T77A1 labels for the Taiwanese 9 mm submachine-gun family; available public sources do not provide a clean variant tree beyond prototype and production-model distinctions.
| Variant | Configuration | Designation notes |
|---|---|---|
| Early T77 prototype | Prototype configuration | Chinese-language references describe a 1985 prototype publicly shown before the later standardized production form. Sources: T77 Chinese Wikipedia, Modern Firearms T77 |
| Production T77 | Standardized service model | The production model is described with a folding stock, 215 mm barrel, open-bolt blowback operation, and 15- or 30-round magazines. Sources: Modern Firearms T77, T77 Chinese Wikipedia |
Ammunition Fired
The T77 is consistently described as a 9x19 mm Parabellum submachine gun.
| Ammunition | Ammunition type | Firing evidence |
|---|---|---|
 | 9x19 mm pistol and submachine-gun cartridge | Modern Firearms lists the T77 chambering as 9 mm Luger / 9x19 mm Parabellum, matching the cataloged 9 mm Luger cartridge entry. Sources: Modern Firearms T77 |
Sourcing Boundary
The record is intentionally marked relationship-only because available sources support development, specifications, manufacturer attribution, Taiwanese service context, and image provenance, but do not directly document T77 use in a named conflict or crisis cataloged by this site.
Timeline
T77 submachine gun Key Events
Prototype design appears
Chinese-language reference material places the first T77 prototype in 1985, before the later standardized production model.
Sources: T77 Chinese Wikipedia
Improved configuration publicized
The 1991 configuration is described with revised furniture, sighting details, and barrel attachment changes before the final production form.
Sources: T77 Chinese Wikipedia
Production service model reported
Open references describe 1992 as the point when the standardized T77 entered Republic of China service.
Sources: T77 Chinese Wikipedia
205th Arsenal display includes T77
Military Link's visit report from the Armaments Bureau Production Center's 205th Arsenal labels a displayed firearm as the 9 mm T77 submachine gun.
Sources: Military Link 205th Arsenal Visit
Media
T77 submachine gun Images
Related Weapon Systems
Sources
Modern Firearms T77Publisher: Modern Firearms | Note: Supports 205th Arsenal manufacturer attribution, late-1980s development context, MAC-11/Cobray M11/9 lineage, operating system, controls, stock, sights, magazine, and core specifications. | Accessed: 2026-07-06WeaponSystems.net 205th Arsenal T-77Publisher: WeaponSystems.net | Note: Supports baseline identity as 205th Arsenal T-77 and submachine-gun classification. | Accessed: 2026-07-06T77 Chinese WikipediaPublisher: Wikipedia | Note: Baseline terminology source for Chinese-language designation, prototype and production chronology, service context, dimensions, rate-of-fire range, and reported Republic of China users. | Accessed: 2026-07-06Military Link 205th Arsenal VisitPublisher: Military Link | Note: Supports the 205th Arsenal display context and identifies a displayed firearm as the 9 mm T77 submachine gun. | Accessed: 2026-07-06T77 SMG Wikimedia Commons ImagePublisher: Wikimedia Commons | Note: Image provenance for the primary T77 photograph, including author and CC BY-SA 4.0 licensing context. | Accessed: 2026-07-06T77 SMG Firing Stance Wikimedia Commons ImagePublisher: Wikimedia Commons | Note: Image provenance for a Republic of China Military Police firing-stance photograph and its CC BY-SA 4.0 licensing context. | Accessed: 2026-07-06