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SMA Gun Block Practice Test

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Which mechanism prevents rounds from feeding through both feed paths at once?
Correct Answer:
Forward/Aft Feed Gates
Explanation:
The mechanism tested is the one that selects and gates the feed paths so only one path can be used at a time. The forward/aft feed gates act as an interlock: when one path is enabled, the other is physically blocked, so rounds cannot be fed through both tracks simultaneously. This prevents jams and misfeeds by ensuring a single, controlled feed direction during cycling. Other components have different roles—bolt position indicator shows where the bolt is, an optical encoder tracks positions for timing, and the rocker handles actuation of feed components—none of which by themselves prevent dual-path feeding.

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