AK-74 Meltdown!

Published on September 15, 2016
Duration: 15:11

This Vepr 5.45 AK-74 variant, converted by Definitive Arms, underwent a full-auto meltdown test. The rifle failed after 799 rounds due to lacquer primer sealant from Wolf ammunition gumming up the bolt face and firing pin channel, not a mechanical defect. Significant throat erosion and slight muzzle droop were noted.

Quick Summary

The Vepr 5.45 AK-74 failed its meltdown test at 799 rounds due to melted lacquer primer sealant from Wolf ammunition gumming up the bolt face. This prevented ignition, marking it as an ammo-related failure, not a mechanical defect of the rifle itself.

Chapters

  1. 00:00Intro: Vepr 5.45 Meltdown Test Setup
  2. 01:30Full Auto Firing Begins
  3. 05:55Rifle Stops Firing: Initial Failure
  4. 07:15Diagnosing the Failure: Ammo Sealant
  5. 08:18Final Round Count & Barrel Assessment

Frequently Asked Questions

What caused the AK-74 Vepr 5.45 to fail during the meltdown test?

The Vepr 5.45 failed after 799 rounds due to melted lacquer primer sealant from Wolf ammunition gumming up the bolt face and firing pin channel. This prevented the firing pin from igniting the primers, indicating an ammunition-related issue rather than a mechanical failure of the rifle.

How many rounds did the Vepr 5.45 AK-74 withstand in the meltdown test?

The Vepr 5.45 AK-74, converted by Definitive Arms, endured a total of 799 rounds during the full-auto meltdown test before it stopped firing. The failure was attributed to ammunition issues, not a breakdown of the rifle's components.

What modifications were made to the Vepr 5.45 for the test?

This Vepr 5.45 featured a heavy RPK-style barrel and was converted by Definitive Arms in St. Petersburg, FL. The test focused on its endurance under full-auto fire, pushing the rifle to its limits.

What were the long-term effects of the meltdown test on the rifle's barrel?

The high-volume, high-velocity 5.45x39mm firing caused significant throat erosion in the barrel. Additionally, the extreme heat resulted in a slight muzzle droop, indicating the stress the barrel endured.

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