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In Physics / Junior High School | 2025-05-22

it is a portable brass gauze which is used to cover open sighting ports​

Asked by abbylaurencecolita

Answer (1)

Dust cover: A seal for the ejection port (which allows spent brass to exit the upper receiver after firing) from allowing contaminants such as sand, dirt

Answered by lakshmi12102008 | 2025-05-22

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