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Upper Receiver And Rear Sight Assembly 

Upper Receiver And Rear Sight Assembly

(1) Rear Sight Assembly
(2) Rear Sight Windage Knob Retaining Pin
(3) Rear Sight Windage Knob
(4) Rear Sight Windage Knob Helical Spring
(5) Rear Sight Windage Knob Ball Bearing
(6) Rear Sight Windage Screw
(7) Rear Sight Aperture
(8) Rear Sight Flat Spring
(9) Rear Sight Base
(10) Rear Sight Retaining Pin
(11) Rear Sight Elevation Helical Spring
(12) Rear Sight Elevation Index Ball Bearing
(13) Rear Sight Elevation Index Helical Spring
(14) Rear Sight Elevation Index Screw
(15) Rear Sight Elevation Index
(16) Rear Sight Elevation Knob
(17) Ejection Port Cover Retaining Ring
(18) Ejection Port Cover Pin
(19) Ejection Port Cover Helical Spring
(20) Ejection Port Cover
(21) Forward Assist Retaining Pin
(22) Forward Assist Assembly
(23) Forward Assist Helical Compression Spring
(24) Upper Receiver