Do not remove liner from heat shield. Remove heat shield from barrel (M240B only).
Clamp in gas port area (1) only.
UNIT MAINTENANCE OF BARREL ASSEMBLY
Rotate collar (8) until it releases, and then pull it out.
Drive out plug (9) using a brass hammer (10). Catch plug (9) to prevent damage. Remove barrel (11) from vise.
Inspect flash hider/suppressor (1), collar (2) and plug (3) for dents or burrs. Replace if damaged. If other parts of barrel assembly are damaged, notify direct support maintenance.
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