This AR-15 aluminum forearm end cap provides a durable finishing component for your rifle build with a black anodized finish and precision machining for reliable performance.AR-15 Forearm End Cap - Model YHM-9484A7/8'' diameter sizing (also referenced as 15/16'')Aluminum construction for lightweight durabilityBlack finish for corrosion resistancePrecision machined for AR-15 platform compatibilityEssential for completing AR-15 handguard installations this end cap ensures a professional finish while protecting internal components from debris and environmental elements.