Springer Precision Extra Power Magazine Spring for S&W M&P 9mm/10mm

Upgrade your Smith & Wesson M&P 9mm or 10mm magazines with the Springer Precision Extra Power Magazine Spring. Designed specifically for 17-round 9mm and 15-round 10mm factory magazines, this high-performance spring delivers consistent, reliable feeding even under demanding conditions. Key Features Precision-engineered for direct fit in S&W M&P 9mm and 10mm magazines Ideal companion for factory magazines or when paired with 140mm magazine extensions Helps maintain optimal spring tension in frequently used or stored magazines