The Brazilian Uru SMG: A Study in Simplicity

Published on April 26, 2017
Duration: 9:22

This guide details the field stripping and reassembly of the Mekanika Uru SMG, a remarkably simple submachine gun designed by Olympio Vieira de Mello. The process, as demonstrated by Ian McCollum, highlights the firearm's minimal component count (17 parts) and straightforward operation, emphasizing its cost-effective design. The guide covers the removal of the buttstock, barrel, receiver separation, bolt assembly, and fire control group.

Quick Summary

The Mekanika Uru SMG is a 9mm Brazilian submachine gun renowned for its extreme simplicity, featuring only 17 parts and no pins or screws. It operates via a simple blowback mechanism with a 750 RPM rate of fire and a 30-round magazine.

Chapters

  1. 00:00Introduction to the Uru SMG
  2. 01:18Technical Specifications
  3. 02:11Disassembly and External Features
  4. 03:43Internal Mechanics and Fire Control
  5. 05:25Selector and Safety Operation
  6. 07:16Drop Safety Mechanism
  7. 08:34Conclusion and Rarity

Frequently Asked Questions

What makes the Mekanika Uru SMG unique?

The Mekanika Uru SMG is unique due to its extreme simplicity, featuring only 17 parts and no pins or screws in its construction. Designed by Olympio Vieira de Mello, it was intended to be a highly cost-effective weapon.

What are the key technical specifications of the Uru SMG?

The Uru SMG is chambered in 9mm Parabellum, operates via simple blowback, has a rate of fire around 750 RPM, and uses a 30-round single-feed magazine. Its minimal part count is a defining characteristic.

How rare is the Mekanika Uru SMG in the United States?

The Uru SMG is quite rare in the US, with only about 10,000 originally manufactured. Complete, transferable examples are seldom encountered on the National Firearms Act registry.

What is the operating principle of the Uru SMG?

The Uru SMG operates on a simple blowback system. This means the bolt is not locked to the breech; instead, the inertia of the bolt and recoil spring manage the opening of the breech after firing.

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