HEXMAG Carbon Fiber Sig Sauer P320 Full Size 9mm Luger Handgun Magazine - 17 Rounds - Extremely rugged, exceptional performance, and highly reliable. HEXMAG's line of Carbon Fiber compatible pistol magazines are the only ones that offer this unique blend of materials to provide unmatched capability in a lightweight pistol magazine. Easy to index from pouch to gun with the ergonomic and tactile shape built right in to the magazine. The only true carbon fiber design on the market today and available at a fraction of the cost for a metal magazine. Features Increased strength at the feed lips; Heat treated anti-fatigue stainless steel spring; Tool less take down; HEXID compatible; Round count indicator on side; New improved grip and hold from HEXTURE-X pattern; Due to the nature of the carbon fiber material, HEXMAG carbon fiber magazines are only available in BLACK.