Which of the following shooting stances is NOT used for a semiautomatic rifle/carbine?

The stance that is not commonly used for a semiautomatic rifle or carbine is the sitting position. While shooters can certainly use the sitting position when necessary, such as in certain competition scenarios or for prolonged shooting, it is generally less practical for dynamic engagements encountered in many tactical or self-defense situations.

The other stances—standing, kneeling, and low ready—are actively employed for various reasons. Standing allows for mobility and is often used in situations requiring quick movement. Kneeling provides a stable platform while still enabling shooters to remain low and maneuverable. A low ready position is a critical safety and readiness posture, allowing the shooter to prepare for engagement while minimizing the risk of an accidental discharge.

These shooting positions effectively address various tactical requirements, making them more widely adopted compared to the sitting stance, which is less versatile in fast-paced or unpredictable environments.