KRG Mag Release Button – Aluminum. Provides fast, ambidextrous mag changes. Standard on Gen 1–4 Whiskey-3 Chassis, also fits Bravo, X-Ray (late Gen 1 & all Gen 2), 180-Alpha, and 180-Xray (Howa inlet). 6061 aluminum, hard anodized. Weight: 0.3 oz. Made by KRG. ITAR Restricted.