Comment: Now police forces are looking at the safety issues of the M18 gun.
HERE is background on all semi-automatic pistols. The 1911 pistol could be accidentally fired when a paratrooper hit the ground after jumping. Carry Condition 3 solved that problem.
Real Bottom Line: Is there a round in the chamber or not?
Colonel Jeff Cooper's explanation of carry conditions for semi-automatic pistols as told by Massad Ayood.
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The late, great gun expert Jeff Cooper popularized a four-part series of terms to describe the level of readiness of his signature handgun, the 1911 .45 auto. He later supplemented it with a fifth. Cooper’s terminology has become virtually standard, and it applies to every other type of semi-automatic pistol.
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The 1911 carry conditions identified by Cooper went like this:
Condition One was fully loaded, magazine in place and a live round in the chamber, with the hammer back and the thumb safety engaged in the “on safe” position. This became known as “cocked and locked.”
Condition Two described a loaded magazine in the pistol, live round in the chamber, but the hammer lowered.
Condition Three saw the loaded magazine in place but the hammer down on an empty chamber.
Condition Four meant a pistol completely unloaded, with a full magazine hopefully somewhat readily at hand.
Later, when he learned of a military unit in another country that carried its P-35 pistols fully loaded with a round in the chamber, cocked and off-safe, Col. Cooper coined the term Condition Zero for that practice.
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Army Field Manual for the 1911 goes into great detail: https://ibiblio.org/hyperwar/USA/ref/FM/PDFs/FM23-35.pdf
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https://www.wilx.com/2025/07/26/michigan-state-police-adopt-controversialu-pistol-tied-airmans-death/
"Michigan State Police to adopt controversial pistol tied to Airman’s death"
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SIG Sauer says the P320 is safe and the problem is user error.
“It’s an interesting situation because no one can really prove what’s happening,” said Thomas.
The U.S. Air Force Global Strike Command recently paused the use of the gun following the death of a security forces airman at a base in Wyoming.
SIG Sauer released a statement, saying “Our hearts are with the service members and families,” and expressed confidence in the Air Force’s investigation.
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https://gunmagwarehouse.com/blog/double-action-vs-single-action-vs-striker-fired-handguns-whats-the-difference/
"Double-Action vs. Single-Action vs. Striker-Fired Handguns: What’s the Difference?"
Quote:
As a class of handguns, the most popular models are not true double action or single action, but recently single action striker-fired handguns have taken off. The adopted Sig M17/M18, as well as versions of Sig P365, are two notable examples of striker-fired handguns that feature a crisp trigger paired with a manual safety similar to a hammer-fired single-action.
