There are reports that some M2A1 barrel extensions have excessive wear and damage. This damage is occurring because the M2A1 timing adjustment isn’t being performed during annual services or whenever a major subcomponent is replaced.
Some maintainers may only be ensuring the M2A1 doesn't fire with the NO-GO gauge during annual services, using the guidance in TM 9-1005-347-23&P (Jul 11). Maintainers need to understand that subcomponents experience normal wear and break-in during the initial timing adjustment period, which can result in slippage to the weapon’s timing.
Timing should always
be readjusted during scheduled maintenance and whenever a major subcomponent is replaced.
In the months to come, the M2 and M2A1 TMs will be combined into TM 9-1005-213-23&P. Until then, maintainers must make sure they readjust the M2A1 timing during annual services or whenever a major subcomponent is replaced.
Editor’s note: Thanks for the update, Wayne. Maintainers, don’t forget the timing during annual services and major maintenance.