The notch (22) in headspace gage (warning (23)/reject (25)) must face upward and toward the rear of chamber (24) to provide clearance for ejector.
Insert headspace gage (warning (23)/reject (25)) with notch up in chamber (24).
Carefully place barrel assembly (4) back into receiver (13) and lock in position.
Slide bolt and operating rod assembly (21) forward and exert slight pressure to determine if weapon is in locked or unlocked position.
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