An almost great port cover. - Strike Industries Ultimate Dust Cover for .223 AR-15 Standard

This cover fits well and is very easy to install. The adjustable ball detent is really nice to adjust the cover snapping shut on your particular upper. If you have ever installed a standard port cover and had issues with it being difficult to close, won't close at all, the Strike Industries cover solves that. So why only 4 stars? Because the provided rubber pads have adhesive backs and of the 2 fell off even before ever firing the gun! Granted, Strike Industries provides a couple extras in the box but I can see these pads not lasting long at all.