Step 5. Check for looseness between Tower Portion (11) and Tube Portion (12). If looseness exists, notify Direct Support Maintenance.
Step 1. Failure to chamber malfunction is characterized by a round of ammunition not fully seating in the barrel because the bolt rides under the round. The unchambered round usually exhibits a damaged/bent condition similar to the illustration.
Several conditions can cause the round to not fully chamber and should be diagnosed in the following order:
a. Check for a spent cartridge case in the bottom of the receiver which would not allow the bolt to fully chamber a round. If a spent cartridge is found in the bottom of the receiver, refer to failure to extract and failure to eject malfunction troubleshooting procedures.
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