Failure To Lock

Step 1. Dirty or damaged ammunition (1).

Replace ammunition. Step 2. Bolt cam pin (2) broken or missing.

Replace bolt cam pin (p 2-24). Step 3. Loose or damaged bolt carrier key (3)

Evacuate to direct support maintenance Dented carrier keys (3) may be repaired (p 2-22) using the fabricated (fig E-3, app E).

Step 4. Improperly assembled extractor (4) to extractor (5).

Assemble correctly (p 2-29).

Adjust/bend gas tube in area of the handguard to its original configuration. If the gas tube cannot be repaired to its original configuration, evacuate weapon to direct support maintenance

Step 6. Weak or broken action spring (7).

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