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This Glock Failed a Drop Test – Full Fix & Safety Upgrade
This Glock Failed a Drop Test – Full Diagnostic & Fix
Video Walkthrough: Watch on YouTube
In this video, Johnny Glocks takes you inside a complete diagnostic and performance upgrade for a Glock build that came in with serious safety issues — including double firing and a failed drop test. You’ll see exactly how we inspect, troubleshoot, and correct each problem for both performance and safety.
What This Glock Came In With
- Failed drop test
- Double firing issues
- Unsafe sear engagement
- Trigger job that needed full replacement
Step-by-Step Diagnostic Process
1️⃣ Initial Safety Check
Before touching any internal components, we perform a full safety inspection — visually and physically confirming the firearm is clear, then checking for obvious functional issues.
🔗 Watch How-To perform Safety Checks video here.
2️⃣ Guide Rod Setup
We begin with the guide rod assembly, ensuring proper spring weight and seating. An incorrect guide rod setup can cause cycling issues and affect reset.
3️⃣ Trigger Replacement
The trigger job on this Glock was beyond salvage — it compromised safety and reliability. We swapped it out for a properly tuned Johnny Glocks trigger system to ensure crisp break, proper reset, and safe engagement.
4️⃣ Sear Engagement Correction
We found insufficient sear engagement, which can cause accidental discharge or doubles. Adjustments were made to restore safe, consistent engagement while maintaining performance.
5️⃣ Drop Test Verification
After the rebuild, the Glock underwent a proper drop test to confirm it would not discharge when dropped. This is a non-negotiable step in any build.
Educational Note
This video is for educational purposes only. If you’re making internal changes — especially to triggers or safeties — you must know what you’re doing. Always function test, check sear engagement, and perform a drop test before considering the job complete. Watch our Safety Checks & Tests video here.
Key Takeaways
- Never skip safety checks — your safety depends on them.
- Know when to replace vs. adjust — some parts are beyond fixing.
- Proper sear engagement is critical to preventing accidental discharge.
- Drop tests are mandatory after internal changes.
Watch the Full Breakdown
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