How it Works: Nagant 1877

Published on August 30, 2023
Duration: 2:59

This guide details the operation of the Nagant 1877 revolver, highlighting its unique dual rolling block mechanism. It explains the process of cocking both independent hammers, loading, firing, and the function of the selective transfer lever that allows a single trigger to actuate both sears sequentially. The guide also covers the breech block rotation, extractor operation, and the half-cock notch safety.

Quick Summary

The Nagant 1877 revolver utilizes a unique dual rolling block system. It features two independent hammers and floating firing pins. A single trigger sequentially fires the right barrel first, then the left, with the hammers locking the breech block shut when down. The half-cock notch on each hammer serves as the primary safety.

Chapters

  1. 00:00Introduction to the Nagant 1877
  2. 00:09Dual Rolling Block Mechanism
  3. 00:13Loading Procedure: Cocking Hammers
  4. 00:29Breech Block Rotation and Bias
  5. 00:45Loading and Closing the Breech
  6. 00:54Floating Firing Pins
  7. 01:00Trigger Operation: Firing Right Barrel
  8. 01:07Trigger Operation: Firing Left Barrel
  9. 01:14Hammer Lock on Breech Block
  10. 01:23Extractor Mechanism
  11. 01:37Half-Cock Safety
  12. 01:58Selective Transfer Lever Explained
  13. 02:04Trigger Action with Right Hammer Cocked
  14. 02:14Trigger Action with Right Hammer Down
  15. 02:24Summary of Operation
  16. 02:27Conclusion

Frequently Asked Questions

How does the Nagant 1877's breech block operate?

The Nagant 1877 features a breech block that rotates open after both hammers are cocked. It's biased by a spring-powered lever, and its teardrop tip shifts this bias as it opens, allowing for loading.

What is unique about the Nagant 1877's firing mechanism?

The Nagant 1877 has two independent hammers and two floating firing pins within the breech block. A single trigger sequentially releases the right hammer first, then the left hammer on a subsequent pull.

How does the Nagant 1877 provide safety?

The primary safety on the Nagant 1877 is the half-cock notch on each hammer. When a hammer is in the half-cock position, the breech cannot be opened, and the trigger cannot be pulled.

What is the function of the selective transfer lever in the Nagant 1877?

The selective transfer lever allows a single trigger to operate both hammers sequentially. It directs the trigger's action to the right sear when the right hammer is cocked, and to the left sear when the right hammer is down.

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