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Paul Cortes They had what I needed and were willing to ship to California. (Many vendors are not due to the difficulty in keeping up with our ever-changing gun laws.)
Factory OEM Part #422180000
Genuine Smith & Wesson factory slide stop spring for M&P Shield pistols. Essential component that provides tension for the slide stop lever.
✓ Compatible with:
The slide stop spring provides the upward tension needed for the slide stop lever to engage the slide notch when the magazine is empty, locking the slide to the rear. Also provides tension for the takedown lever function.
Replace if slide fails to lock back on empty magazine, if spring shows signs of weakening or compression, or if takedown lever feels loose.
Maintain reliable slide lock function with genuine Smith & Wesson factory parts.