$7.59 Battle Arms Development Complete Ejection Port Cover Door Assembly with Pin/Spring/Clip Add to Cart
$7.99 Aim Sports Inc. AR-15 Complete Dust Cover (Ejection Port Door) Assembly Matte Black Finish Add to Cart
$9.71 GrovTec AR-10/AR-15 .308 Win, .300 AAC 5/8-24x.750" Muzzle Thread Protector Steel Black GTHM247 Add to Cart