Just a "heads up" for those of you using pistols with the "nested" recoil springs.....Midway has some of the outer springs in stock, OEM part # 10866. These have been hard to find in the past few years. Kind of hit and miss.

Smith & Wesson Recoil Spring Outside S&W 4013TSW 4053TSW 4513TSW

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Ret. LE, FA Instr, S&W Armorer

I called S&W a few months back and they sent me a new inner and outer for my 4013TSW at no charge. Give them a call.