IM DONE with the Geissele SD3G! Big problems!

Published on October 15, 2025
Duration: 4:50

Reno May details recurring issues with the Geissele SD3G trigger, specifically hammer follow and dead triggers, which he has experienced across multiple firearms. While acknowledging the trigger's speed potential, he expresses disappointment and uncertainty about future purchases due to these reliability concerns, especially in high-stress scenarios. He is documenting the issue for Geissele's review.

Quick Summary

Reno May is experiencing recurring 'hammer follow' with the Geissele SD3G trigger, leading to dead triggers, especially during rapid fire. This issue, observed across multiple firearms, is concerning for reliability and makes him hesitant to use it for home defense, despite the trigger's speed potential.

Chapters

  1. 00:00Introduction to Geissele SD3G
  2. 00:13Recurring Problems: Hammer Follow
  3. 00:26Demonstrating a Dead Trigger
  4. 01:25Trigger Goes Dead During Rapid Fire
  5. 01:36Investigating the Malfunction
  6. 01:48Spicy Extraction and Casing Dent
  7. 02:03Comparing Casing Dents
  8. 02:23Dead Trigger During Fast Shooting
  9. 03:00Pattern of SD3G Issues
  10. 03:35Hopes for Geissele Diagnosis
  11. 03:51Potential Causes: Recoil and Bolt Bounce
  12. 04:07BCM Intermediate Carbine System
  13. 04:33Home Defense Concerns
  14. 04:46Viewer Feedback Request

Frequently Asked Questions

What is the main problem Reno May is experiencing with the Geissele SD3G trigger?

Reno May is experiencing 'hammer follow' or 'bolt follow,' which results in a dead trigger. This means after firing, the trigger becomes unresponsive, preventing subsequent shots, particularly when shooting rapidly.

What are the potential causes of hammer follow with the Geissele SD3G trigger?

Potential causes include the hammer dropping before the bolt is fully in battery under recoil, or bolt bounce. The speaker notes that even with a BCM intermediate carbine system designed to reduce bolt bounce, the issue persists.

How does the Geissele SD3G trigger differ from standard triggers?

The Geissele SD3G is not a traditional single-stage or two-stage trigger. It's described as having a 'rolling break,' which allows for very fast shooting, but this design may contribute to its reliability issues under certain conditions.

Why is Reno May hesitant to use the Geissele SD3G for home defense?

He is hesitant because a dead trigger malfunction in a high-stress, life-threatening situation would require a tap-rack clearance, which is undesirable. Reliability is paramount for home defense firearms.

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