When it comes to semi-automatic pistols, the phrase “cocked and locked” refers to a pistol having a round chambered, hammer cocked, and safety on. Technically, a pistol must have a single-action mode (hammer cocked) and have a secondary safety switch. This automatically disqualifies modern-style pistols like Glocks, S&W M&Ps, Springfield XDs, and Sig Sauers (excluding the Sig 1911 of course!). The phrase cocked and locked originated with John Browning’s 1911 design and is also known as “Condition 1.”
Some of the more prominent pistols that can be carried “cocked and locked” include:
Beretta 92 (note that later 92S models eliminated the manual thumb safety)
Taurus PT92 (based on Beretta’s design)
Sig Sauer P226 SAO
EAA Witness (CZ 75 clone)
Hechler & Koch USP
There are many debates online about the inherent safety of carrying a firearm cocked and locked. Mechanically, a modern pistol is very safe to carry that way. However, the overall level of safety depends on the carrier’s familiarity and experience carrying a pistol in Condition 1.
My advice? If you want to carry cocked and locked, practice extensively at the range and get some advice from an experienced carrier.