New AR Owner Tip - Engaging the Safety

Published on July 31, 2025
Duration: 1:22

This video provides a crucial tip for new AR-15 owners regarding the interaction between the safety selector and the hammer. It explains that on most AR-style platforms, including those with milspec and many aftermarket triggers like CMMG's Zero Drop-in, the firearm must be charged (hammer cocked) for the safety to be engaged. This prevents accidental engagement when the hammer has fallen after a live fire.

Quick Summary

On AR-style firearms, the safety selector can typically only be engaged when the hammer is cocked. If the hammer has fallen after firing, you must charge the firearm to cock the hammer before the safety can be moved to the 'safe' position. This applies to both milspec and many aftermarket triggers.

Chapters

  1. 00:02Introduction to AR Safety
  2. 00:23Safety Selector Interaction Explained
  3. 00:32Fire Position and Hammer Fell
  4. 00:44Charging to Engage Safety
  5. 00:57Aftermarket Trigger Example (CMMG)
  6. 01:05Hammer Down for Safe
  7. 01:10Tip for First-Time Gun Buyers

Frequently Asked Questions

Why can't I always put my AR-15 on safe?

On most AR-style platforms, the safety selector can only be fully engaged when the hammer is cocked. If the hammer has fallen after firing, you'll need to charge the firearm again before the safety can be moved to the 'safe' position.

Does this safety rule apply to aftermarket AR-15 triggers?

Yes, this interaction between the safety selector and the hammer is common on AR-style platforms and applies to both standard milspec triggers and many aftermarket triggers, including CMMG's Zero Drop-in series.

What is the correct procedure to put an AR-15 on safe after firing?

After firing an AR-15 and the hammer has fallen, you must first cycle the action to cock the hammer. Once the hammer is cocked, you can then safely engage the safety selector to the 'safe' position.

Is this a common issue for new AR-15 owners?

Yes, this is a common point of confusion for first-time AR-15 owners. Understanding that the hammer must be cocked for the safety to engage is a crucial piece of operational knowledge.

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