Rolling Thunder Leather Magazine Cap Loop The Rolling Thunder Leather Magazine Cap Loop is a leather accessory identified by its magazine-cap attachment role. The loop format supplies the flexible connection element, while the leather is the confirmed construction material. Select this accessory by its full product name and confirm the magazine-cap fit. The leather loop is the connecting component of the accessory. Key Features Leather material: Leather loop construction. Named accessory: Magazine Cap Loop design. Specifications Brand: Rolling Thunder Product: Magazine Cap Loop Material: Leather Shop the Rolling Thunder Leather Magazine Cap Loop at BattleHawk Armory.