1
Richard E Swan: Modular sleeve. John P McGonagle, December 10, 2002: US06490822 (159 worldwide citation)

A Swan universal receiver sleeve attached to the top of a firearm upper receiver and extended forward above the firearm barrel to a position just short of the firearm front sight. The underside of the rear portion of the sleeve is fixedly attached to the receiver top. The underside of the forward po ...


2
Richard E Swan: Modular sleeve yoke. John P McGonagle, December 31, 2002: US06499245 (116 worldwide citation)

A Swan universal receiver sleeve attached to the top of a firearm upper receiver and extended forward above the firearm barrel to a position just short of the firearm front sight. The underside of the rear portion of the sleeve is fixedly attached to the receiver top. The underside of the forward po ...


3
Richard E Swan: Universal receiver sleeve. John P McGonagle, September 1, 1992: US05142806 (87 worldwide citation)

A sleeve added to the upper receiver of a firearm for incorporating firearm ancillary equipment. The sleeve has an upper enhancement interface portion and a lower firearm interface portion. The upper enhancement interface portion has standard, universal dimensions regardless of the firearm. The lowe ...


4
Richard E Swan: Modular sleeve. Barlow Josephs & Holmes, April 8, 2008: USRE040216

A Swan universal receiver sleeve attached to the top of a firearm upper receiver and extended forward above the firearm barrel to a position just short of the firearm front sight. The underside of the rear portion of the sleeve is fixedly attached to the receiver top. The underside of the forward po ...


5
Richard E Swan: Modular sleeve yoke. Barlow Josephs & Holmes, January 16, 2007: USRE039465

A Swan universal receiver sleeve attached to the top of a firearm upper receiver and extended forward above the firearm barrel to a position just short of the firearm front sight. The underside of the rear portion of the sleeve is fixedly attached to the receiver top. The underside of the forward po ...


6
Swan Richard Emerson: Universal receiver sleeve. Swan Richard Emerson, McGONAGLE John P, April 1, 1993: WO/1993/006429

A sleeve (2) added to the upper receiver (12) of a firearm for incorporating firearm ancillary equipment. The sleeve (2) has an upper enhancement interface portion (20) and a lower firearm interface portion (40). The upper enhancement interface portion (20) has standard, universal dimensions regardl ...