Bolt carrier bearing tube for rifle receiver
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United States of America Patent
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Jul 11, 2017
Grant Date -
Jun 29, 2017
app pub date -
Mar 13, 2017
filing date -
Dec 15, 2015
priority date (Note) -
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Abstract
A metal tube provides a bearing for a bolt carrier in a rifle. The tube is machined to provide openings and co-molded with a polymer outer shroud to form a lightweight composite upper receiver. The tube has an inner surface that supports the bolt carrier in its reciprocal motion during cycling of the rifle action during firing. The length and diameter of the tube are designed to prevent tilt of the bolt carrier during operation.
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