The action of a magazine spring is to push. A wide load and deflection range is achieved with magazine springs, and a constant or variable rate can be achieved. Magazine springs are compression springs coiled in an oval, rectangular ,or Square shape instead of being round. They are most commonly used in firearms, Bendix Drives , Starter motors & Carbon Brush Holder. Magazine springs are essential components in carbon brush holders to ensure proper contact and tension between the carbon brush and the commutator or slip ring in electric motors or generators. Magazine springs are also used predominantly in firearm magazines to ensure reliable ammunition feeding. Their design and performance significantly influence magazine capacity, reliability, and durability. Fatigue resistance is critical, as magazine springs experience repeated load cycles. Magazine springs are compression springs engineered to push cartridges upward into the feeding position.