Assertion: rifle's receiver | /r/CapableOf | serve as the system's shroud
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Source sentences:
text: The M98 system consists of a receiver that serves as the system's shroud and a bolt group of which the bolt body has three locking lugs, two large main lugs at the bolt head and a third safety lug at the rear of the bolt, which serves as a backup in case the primary locking lugs failed.