Note

There are two types of flash suppressors. The earliest design is open ended with three prongs. The latest is a closed-end design and is the only authorized repair part.

All M16A1 rifles assigned to divisional combat units must be equipped with the closed end flash suppressor. M 16A1 rifles assigned to noncombat unit and training center units may be equipped with either the open or closed end type flash suppressor. If the old type flash suppressor is removed, it must be replaced with the new type flash suppressor.

3-13. UPPER RECEIVER AND BARREL ASSEMBLY (CONT).

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