| Issue | Correction | Severity |
|---|
| 1. Gas adjustment valve hairpin clip is oversized and falls off easily when the handguard is removed. | Use a properly sized hairpin clip. | Low |
| 2. Gas block screws do not have any thread locking compound. | Use a thread locking compound, preferably Loctite 272 (high temperature, red). | Low |
| 3. Barrel nut was not greased during assembly. | Use grease on the barrel extension, barrel nut threads, and barrel shoulder, preferably Aeroshell 64 (formerly 33Ms). | Medium |
| 4. Barrel lacks dimpling for one of the two gas block screws. | Dimple the barrel. | Low |
| 5. Picatinny slots are out of spec on the handguard, upper receiver, and lower receiver. | Update the CNC machining program. | Medium |
| 6. Picatinny slots on the handguard are not aligned with the upper receiver. | Update the CNC machining program. | Low |
| 7. M-LOK slots are out of spec on the handguard. | License the free MAGPUL M-LOK design and update the machining program. | Low |
| 8. Clearance on the backside of the M-LOK slots is too narrow and will not allow the T-nuts to fully lock in place. | Update the CNC machining program or update the aluminum handguard extrusion. | Low |
| 9. Handguard cross bolts partially thread into the barrel nut. | Update CNC machining program for the location of the cross bolt screws or update dimensions of the barrel nut. | Medium |
| 10. Handguard steel cross bolts tighten into the aluminum handguard. | Add steel threads to the handguard for the handguard cross bolts to screw into. Potentially use a thread locking compound, preferably Loctite 243 (oil-tolerant, blue). | Medium |
| 11. Charging handle becomes wedged under the handguard. | Design clearance in the handguard or prevent the charging handle slide from overtravelling forward into the handguard. | High |
| 12. Lower receiver lacks M4 feedramps. | Update the CNC machining program to add M4 feedramps. | Low |
| 13. Bolt carrier piston strike face (gas key replacement) screws are not secured in place. | Use a thread locking compound, preferably Loctite 272 (high temperature, red) or stake the screws. | High |
| 14. Rifle did not cycle from the factory. | Verify rifle function with test firing from the factory. | High |