The Atlas Gunworks® 11-Coil Competition Magazine Spring is a drop-in pistol magazine spring designed to deliver match-grade operation without breaking the bank. Featuring high-strength ASTM A401 chrome silicon construction, this ultrareliable spring offers improved service life and smooth feeding performance in rapid-fire shooting applications. Better yet, the 11-coil spring is compatible with both Atlas and Grams competition followers, as well as all 140mm and 126mm magazine tubes for quick installation and versatile service right out of the box. What are you waiting for? Upgrade your mags today and enjoy match-grade field service at a price anyone can afford. Order now.