Upper receiver for a firearm

作者: Paul Oglesby

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参考文章(11)
Darran L. Wardle, Bolt-action rifle receiver ,(2003)
Ricardo Jorge Nunes, Upper receiver device ,(2012)
Christopher Gene Barrett, Auto-loading firearm with gas piston facility ,(2007)
Timothy Ubl, Jarmo Kumpula, Blowback bolt upper receiver and barrel assembly ,(2011)
William Hartsig, Paul Hochstrate, Kevin Audibert, Gregory Thune, Sachin Mistry, Kevin Langevin, Automatic or semiautomatic rifle with folding clamshell buttstock ,(2008)
Robert Lynch Hogan, Robert Bruce Davies, Two piece upper receiver for firearms ,(2011)
Paul Hochstrate, Arthur F. Daigle, Laurance Robbins, Automatic or semi-automatic rifle ,(2006)
David J. Cammack, John P. Gangl, Firearm with dual charging handles ,(2012)