Sig Sauer recoil springs, firing pin springs, mainsprings, and small replacement parts keep P226, P229, and P320 match guns timed for the ammunition actually used. Spring selection matters in USPSA Production, Carry Optics, and Limited, where a power-factor-specific load can change slide speed, ejection, dot movement, and ignition margins. Wolff, Sig Sauer factory, and Springer Precision components provide replacement springs, spring kits, and service parts for routine maintenance or deliberate action tuning. Recoil springs can be matched to slide mass and load impulse, while firing pin and mainspring choices must preserve reliable primer ignition and safe, consistent function. Use complete spring kits when refreshing a high-round-count pistol or when setting a known baseline before altering one variable at a time. Confirm P226, P229, or P320 fitment and the exact spring application before ordering; similarly named Sig platforms do not necessarily share spring dimensions or rates. Build the system around tested match ammunition, then evaluate return-to-battery behavior, ejection, lockback, and ignition across a meaningful round count. Keep spare springs and wear parts on hand for match prep instead of diagnosing a tired system at the range. Fast same-day shipping on most orders at Shooters Connection.