Palmetto State Armory PSAK-74 - Are they safe to shoot or are the locking lugs defective?

Published on May 25, 2021
Duration: 25:27

This guide details the inspection of a Palmetto State Armory PSAK-74, focusing on potential firing pin and trunnion issues. It covers disassembly of the bolt carrier group, inspection of the firing pin and channel for debris or damage, and checking the trunnion lugs for wear. The process concludes with a headspace check using a NO-GO gauge to confirm structural integrity. This procedure is crucial for ensuring the reliability and safety of the firearm, especially following reports of primer puncturing and wear.

Quick Summary

Expert analysis indicates the Palmetto State Armory PSAK-74's trunnion lugs are structurally sound and safe for shooting after testing. However, a significant reliability issue involves the firing pin puncturing primers, causing malfunctions due to debris in the firing pin channel. This requires manufacturer resolution before it's deemed a reliable defensive firearm.

Chapters

  1. 00:00Introduction: PSAK-74 Concerns
  2. 01:55Mishaco's Firing Pin Issues
  3. 02:58Garand Thumb's Trunnion Wear Analysis
  4. 05:43Range Testing & Russian Comparison
  5. 09:08Malfunction: Light Primer Strikes
  6. 11:30Root Cause: Primer Puncturing
  7. 13:30Post-Test Inspection & Headspace
  8. 14:39Final Assessment: Range Toy vs. Defense

Frequently Asked Questions

Are Palmetto State Armory PSAK-74 rifles safe to shoot?

Based on expert analysis, the PSAK-74's trunnion lugs appear structurally sound and safe for shooting, passing headspace tests. However, a recurring issue with firing pins puncturing primers, causing malfunctions, requires manufacturer attention before it can be recommended as a primary defensive firearm.

What causes light primer strikes in the PSAK-74?

Light primer strikes in the PSAK-74 were found to be caused by debris, specifically fragments of punctured primers, lodging in the firing pin channel. This prevented the firing pin from traveling fully forward, reducing impact energy on subsequent primers.

Is trunnion wear on the PSAK-74 a major concern?

While some wear and minor peening on the trunnion locking lugs are normal during the break-in period for AK-pattern rifles, including the PSAK-74, the reviewed sample did not show catastrophic deformation. Comparisons to high-round-count Russian AKs suggest the wear observed can be within expected parameters for initial use.

What is the main reliability issue with the PSAK-74 discussed?

The primary reliability concern highlighted is the firing pin's tendency to puncture primers, particularly with certain ammunition. This allows primer material to enter the bolt's firing pin channel, leading to malfunctions like light primer strikes and a non-moving firing pin.

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