Tiger Rock AR-10/LR-308 Dust Cover Complete Assembly. Made with solid steel construction this dust cover will provide years of reliable service. With the tight fit the spring and rod ensure the cover won't open while it is deployed and the solid seal will keep the ejection port cover in the open position even when it's closed. The ejection port cover is a simple but important step in protecting your rifle against sand dust and debris. Removing the ejection port cover requires some basic tools and knowledge. The Tactical Dust Cover and Seal fits over standard GI BCG dust covers with the small spherical opening. A simple twist of the cover provides an easy one-handed opening and closing. Specifications for Tiger Rock AR-10/LR-308 Dust Cover Complete Assembly: Manufacturer: Tiger Rock Color: Black Finish: Matte Gun Model: DPMS LR-308 AR-10 Fabric/Material: Steel Condition: New Features of Tiger Rock AR-10/LR-308 Dust Cover Complete Assembly Ejection Port Cover Door (Dust cover) Steel Spring Steel Rod Package Contents: Tiger Rock AR-10/LR-308 Dust Cover Complete Assembly What firearm models does the manufacturer say Tiger Rock AR-10/LR-308 Dust Cover Complete Assembly is compatible with? The manufacturer suggests that Tiger Rock AR-10/LR-308 Dust Cover Complete Assembly is compatible with AR-10 DPMS LR-308Tiger Rock DC308: AR-10/LR-308 Dust Cover Complete Assembly DC308