Smith & Wesson M&P 5.7 - Tempo Barrel System

Published on March 15, 2024
Duration: 6:53

This video explains the innovative Tempo Barrel System in the Smith & Wesson M&P 5.7 pistol. Senior Product Engineer John Miles details how the system manages the high pressures of the 5.7x28mm cartridge, preventing issues common in traditional blowback designs. The system utilizes gas ports and a two-part barrel to delay slide action until the bullet exits, ensuring proper case fire-forming and consistent performance.

Quick Summary

The Smith & Wesson Tempo Barrel System is a gas-driven mechanism in the M&P 5.7 pistol designed to handle high-pressure 5.7x28mm rounds. It uses gas ports and a two-part barrel to delay slide action until the bullet exits, ensuring correct case fire-forming and reliable extraction for improved consistency.

Chapters

  1. 00:26Introduction to Tempo Barrel System
  2. 00:59Guest: John Miles, S&W Senior Product Engineer
  3. 01:37How the Tempo System Works
  4. 02:01Challenges of High-Pressure Cartridges
  5. 02:54Tempo Barrel System Mechanics
  6. 03:17Gas Ports and Two-Part Barrel
  7. 04:03Correcting Firearm Timing
  8. 04:395.7x28mm vs. Rifle Rounds
  9. 05:00Reliability and Mechanical Repeatability
  10. 05:34Engineering Success
  11. 06:06Performance Impressions

Frequently Asked Questions

What is the primary function of the Smith & Wesson Tempo Barrel System?

The Tempo Barrel System is designed to manage the high pressures of cartridges like the 5.7x28mm in semi-automatic pistols. It uses a gas-driven mechanism to delay the slide's operation until the bullet has exited the barrel, ensuring proper case fire-forming and reliable extraction.

How does the Tempo Barrel System differ from traditional blowback pistol designs?

Traditional blowback systems can cycle too quickly with high-pressure rounds, leading to extraction issues. The Tempo system uses gas ports and a two-part barrel to control the timing, ensuring the firearm operates only after the bullet has left the muzzle, thus improving reliability and consistency.

What are the key mechanical components of the Tempo Barrel System?

The system features a two-part barrel (inner and outer), gas ports near the muzzle on the inner barrel, and flared areas on the inner barrel that act as gas baffles. A lug and channel create a rotary lock for primary extraction, all timed by gas venting.

Why is the 5.7x28mm cartridge challenging for pistol designs?

The 5.7x28mm is a high-pressure round, generating pressures comparable to some rifle cartridges. This high pressure can overwhelm the slide and extraction system in standard blowback pistols, causing the slide to move too fast and leading to improper case fire-forming.

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