Tacfire Dust Cover AR10 Black Steel Complete Assembly 3.31 is a must-have accessory for protecting your AR10's ejection port. Designed specifically for .308 rifles this durable steel dust cover prevents sand dirt and debris from entering the upper receiver ensuring smooth operation in harsh conditions. Measuring 3.31" in length and featuring a sleek black finish it combines functionality with rugged durability. Perfect for maintaining the longevity and reliability of your firearm this precision-crafted assembly is a reliable upgrade for any shooting enthusiast.