Mekanika Uirapuru
Country: 
BrazilManufacturer: Mekanika Indústria e Comércio
«Metralhadora Uirapuru M971»
Medium machine gunBrazil1975Historic
First fully Brazilian medium machine gun, in 7.62×51 NATO, developed in the 1970s by Mekanika of Rio de Janeiro for the Brazilian Army.
Medium machine gun//Brazil
ID — MEKANIKA-UIRAPURU
Designation
Mekanika Uirapuru
Mekanika Indústria e Comércio
Caliber
7.62×51 mm NATO
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Data trust
- Reliability
- Unverified
- Sources
- Sources pending review
Identity
- Designation
- Mekanika Uirapuru
- Alias
- Metralhadora Uirapuru M971
- Manufacturer
- Mekanika Indústria e Comércio
- Country
- Brazil
- Year
- 1975
- Category
- Medium machine gun
- Status
- Historic
Ballistics
- Caliber
- 7.62×51 mm NATO
- Muzzle velocity
- 840 m/s
- Rate of fire
- ~650 rpm
- Effective range
- 1000 m
- Maximum range
- 1800 m
Dimensions
- Barrel length
- 600 mm
- Overall length
- 1300 mm
- Empty weight
- 13 kg
Mechanics
- Operating system
- Gas-operated, long-stroke piston
- Bolt / action
- Rotating bolt
Feed
- System
- Nastro metallico disintegrabile DM1
- Standard capacity
- 100 rounds
Fire modes
SafeAuto
Historical profile
Developed by engineer Olympio Vieira de Mello in cooperation with the Brazilian Army to reduce reliance on imported MAG and M60.
Adopted in 1975 as M971; gas-operated with rotating bolt and DM1 disintegrable belt feed.
Produced in small batches for the Brazilian armed forces; phased out in the 2000s with the arrival of the FN Minimi 7.62.
Variants
Uirapuru M971
Main users
Brazil
Key components
- ●Stock — Shoulder rest.
- ●Receiver — Weapon body with internal mechanisms.
- ●Grip — Primary grip.
- ●Magazine — Cartridge feed.
- ●Barrel — Guides the projectile.
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