Which of the following safety features would typically be absent in less advanced firearm designs?

The half cock safety notch is designed as a critical safety feature in certain firearm designs, allowing the hammer to rest at a position that prevents it from accidentally firing if the trigger is pulled inadvertently. This feature is particularly associated with older or more traditional firearm designs, where safety mechanisms may have been more rudimentary. In contrast, modern firearms often incorporate more advanced safety features such as automatic safeties or drop safeties rather than relying solely on the half cock notch.

In less advanced designs, the absence of the half cock safety notch reflects a more simplistic approach to safety that does not provide the same level of protection against unintentional discharges. This is why it's essential to highlight that more advanced designs have moved toward more effective safety mechanisms, making the half cock notch less common in them.

The basic grip design does not inherently relate to the safety features but rather to ergonomics and usability. The manual safety switch is present in many firearms, including advanced models, making it a common feature across various designs. The extended trigger pull is more about the operational mechanism of firing rather than safety, focusing on the force needed to engage the trigger, which differs across various firearm models without being specifically tied to advancements in safety features.