These Wilson Combat AR-15 Ejection Port Covers give you the ability to quickly identify upper receivers of various calibers. Finished in Black Armor-Tuff, the covers feature the caliber of your choice. Replaces your existing ejection port cover. Available calibers include: 5.56mm NATO, 6.8 SPC II and 300 BLK. Includes the ejection port cover only, no pin, c-clip or spring. Mfg: Wilson Combat
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