Wilson Combat AR-15 Ejection Port Cover Features The Wilson Combat AR-15 Ejection Port Cover gives shooters an easy way to visually identify the caliber of a given upper receiver which is especially useful for anyone running multiple AR-15 uppers in different chamberings. Finished in Wilson Combat s durable Black Armor-Tuff coating the cover resists wear and corrosion while clearly displaying the 5.56 NATO caliber marking for quick reference at the range or during a caliber swap. As a direct replacement for the factory ejection port cover it installs onto the existing pin c-clip and spring already present on the rifle keeping the swap quick and straightforward. This makes it a simple upgrade for competitive shooters multi-caliber AR builders and armorers managing a rack of rifles in different chamberings. The cover ships as the ejection port cover only without a pin c-clip or spring since it is designed to reuse those existing factory components already installed on a standard AR-15 upper. This keeps the part inexpensive and the installation process fast since no additional small parts need to be purchased or fitted and it means the swap can be done at a bench in minutes with tools most AR-15 owners already have on hand. Wilson Combat s reputation for quality AR-15 components carries through in the fit and finish of this small but useful accessory with the Black Armor-Tuff finish matching the look of other Wilson Combat furniture and small parts on a build. For anyone running more than one AR-15 upper or simply wanting a durable clearly marked ejection port cover that makes caliber identification effortless at a glance this Wilson Combat part is a quick affordable upgrade worth adding to any armorer s parts bin. Wilson Combat AR-15 Ejection Port Cover Specifications Brand: Wilson Combat Fits: AR-15/M16 Caliber Marking: 5.56 NATO Finish: Black Armor-Tuff Includes: Ejection Port Cover Only Available At: GrabAGun