The Savage Arms Impulse Mountain Hunter, Driven Hunter, and KLYM .308 Win / .243 Win 4-Round Magazine is designed for repeated and reliable use with your Savage Arms Impulse rifle. This factory magazine features a corrosion-resistant blued steel body, precision-engineered for a snug fit and reliable performance. The steel wire, high-tensile spring, and steel follower offer smooth, snag-free feeding. Blued steel construction Precision machined for reliable performance High-tensile steel spring Steel base pad