Luth-AR Ejection Port Cover Assembly Black. 5 lbs Shipping Dimensions 4 x 2 x .5 in Weight Ounce 7 Weight lbs .04 UPC Code 859819007850 Package Contents: Luth-AR Ejection Port Cover Assembly Ejection Port Cover Ejection Port Rod and Clip Ejection Port Spring What firearm models does the manufacturer say Luth-AR Ejection Port Cover Assembly is compatible with? The manufacturer suggests that Luth-AR Ejection Port Cover Assembly is compatible with AR-15Luth-AR UR-05A: Ejection Port Cover Assembly Black