Para Ordnance double-stack 1911-pattern magazines use a wider body than standard single-stack 1911 tubes, requiring springs matched to the platform's increased column width and follower geometry. Para pistols built their reputation in USPSA Limited division where the combination of 1911 ergonomics and double-stack capacity gave competitive shooters a familiar trigger package with extended round count. The magazines that made that work need proper spring maintenance to stay reliable. Para magazine springs wear on the same schedule as any high-capacity competition magazine — plan on replacement every 3,000 to 5,000 rounds of competition and practice use. Feeding malfunctions from fatigued Para springs often present as nose-dives in the lower half of the magazine where spring tension is at its minimum. If you're seeing feed failures consistently at specific round counts within a magazine load, spring fatigue is the first thing to rule out before chasing follower or feed ramp issues. Compatible with Para Ordnance P14, P16, and related double-stack 1911-pattern magazines. Fast same-day shipping on most orders at Shooters Connection.