SDI Hammer-Fired Pistols (FTH 223) Practice Test

Controlled feed involves guiding the rim of the cartridge underneath the extractor as the slide moves forward.

Controlled feed involves guiding the rim of the cartridge underneath the extractor as the slide moves forward. Controlled feed and push feed are identical concepts with no significant differences in their mechanisms. Push feed relies on the extractor popping over the rim of the cartridge, similar to controlled feed. Controlled feed allows the rim of the cartridge to sit in front of the extractor during the forward movement of the slide.

Correct Answer:

Controlled feed involves guiding the rim of the cartridge underneath the extractor as the slide moves forward.

Explanation:

In controlled feed the extractor actively retains and guides the cartridge rim as the slide moves forward, keeping the rim under the extractor so the round is carried smoothly into the chamber. This arrangement makes feeding very reliable because the cartridge is captured early and cannot ride over the extractor, reducing misfeeds or jams. So the statement that the rim is guided underneath the extractor during forward movement describes this behavior accurately. In contrast, some other feed designs rely on the cartridge being pushed into the chamber with less control by the extractor, where the rim might not stay under the extractor and the extractor has to snap over the rim later, increasing the risk of feeding problems.

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