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Ships within 48 hours · Estimated delivery Aug 30 - Sep 4
Timing & Performance Notes
Steel Construction: Durable heat-treated steel for long-lasting performance
You should see "16" or a dash variant like "16-1"
6 × Cardboard inserts (8-round capacity each)
Requires specialized tools and precise fitting
Wolff Extra Power Recoil Spring 16LB for S&W 3904/5904 Series 9mm 47416 m639n Timing & Performance NotesWolff Extra Power Recoil Spring 16LB Premium extra power recoil spring designed specifically for Smith & Wesson 3rd Generation 9mm pistols. This 16 pound spring provides increased reliability with full power loads and ensures positive cycling with factory ammunition. Compatible Models: Smith & Wesson Model 39, 439, 539, 639 Smith & Wesson Model 3904, 3906, 3944, 3946 Smith & Wesson Model 59, 459, 559, 659 Smith & Wesson Model 5903, 5904, 5906 Smith &
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