V Seven Ultra-Light Ar-10/DPMS/SR25 Port Door Black. 45percent Lighter Than A Mil-Spec Steel Port Door Type Iii Hardcoat Anodized Mil-Spec Compatibility Titanium Plunger & Stainless Roll Pin Corrosion Resistant Air Weighs 6.7 Grams Designer Weighs 7.8 Grams Classic Weighs 8.3 Grams Package Contents: V Seven Ultra-Light Ar-10/DPMS/SR25 Port Door What firearm models does the manufacturer say V Seven Ultra-Light Ar-10/DPMS/SR25 Port Door is compatible with? The manufacturer suggests that V Seven Ultra-Light Ar-10/DPMS/SR25 Port Door is compatible with AR-10V Seven UL-PD308: Ultra-Light Ar-10/DPMS/SR25 Port Door Black