Step 3. Check for loose Gas Collar (3) on Old Style barrel and replace if defective.
Step 4. Check for looseness between Tower Portion (4) and Tube Portion (5). If looseness exists, notify Direct Support Maintenance.
Step 5. If trigger is hard to pull, check for improperly installed Sear Spring (6) or worn out Tripping Lever Mechanism (7). If Sear Spring (6) is improperly installed (leg between trigger and trigger pin) or the Tripping Lever Mechanism (7) is suspected of being worn out, notify Direct Support Maintenance.
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