Which is NOT a frame aftermarket modification listed?

Which is NOT a frame aftermarket modification listed?

• A. Window Cutting
• B. Spring Replacement
• C. Sight Upgrades
• D. Porting

Answer: (D)

The question is checking which modification changes the frame itself versus adjustments that don’t. Modifications that affect the frame include removing material to alter weight or balance (window cutting) and changing the frame’s internal components like springs that influence how the firearm cycles and feels. Sight upgrades are considered part of the frame system because they change how you align with the firearm and often involve components mounted relative to the frame, even if the sights themselves sit on the slide. Porting, on the other hand, is not a frame modification; it targets the barrel/slide to vent gases and alter recoil, without changing the frame’s geometry or its internal parts. So porting is the one that’s not a frame aftermarket modification.

The question is checking which modification changes the frame itself versus adjustments that don’t. Modifications that affect the frame include removing material to alter weight or balance (window cutting) and changing the frame’s internal components like springs that influence how the firearm cycles and feels. Sight upgrades are considered part of the frame system because they change how you align with the firearm and often involve components mounted relative to the frame, even if the sights themselves sit on the slide. Porting, on the other hand, is not a frame modification; it targets the barrel/slide to vent gases and alter recoil, without changing the frame’s geometry or its internal parts. So porting is the one that’s not a frame aftermarket modification.