The CMMG 9MM Ejection Port Cover Kit is a purpose-built replacement for AR-15 platform firearms chambered in 9mm.
- Part Type: Ejection Port Cover Assembly
- Compatible Firearms: AR-15 chambered in 9mm
- Material: Mil-spec steel
- Finish: Black
- Installation: Drop-in with basic tools
- Includes: Modified ejection port door, C-clip, spring, roll pin










