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DMA Inc. XTS AR-15 Steel Ejection Port Cover Kit - Black

CMMG - Zeroed Polymer Ejection Port Cover Kit, AR15 - 55BA6C8

Mission First Tactical AR-15 Ejection Port Cover Come and Take It

Milspec/GI AR-15 Ejection Port Door/Dust Cover

DMA Inc. XTS AR-15 Polymer Ejection Port Cover Kit - Black

MAGPUL Black Enhanced Ejection Port Cover For AR-15/M4/M16 (MAG1206-BLK)