Spring Load Bearing LCI 40 S&W, 357 Sig & 45 GAP

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New style Spring Loaded Bearings (SLB) used in all current issue 40 S&W, 357 Sig and 45 GAP Finger Grip & Rail (FGR) frames.  The SLB 3439 is shorter than the original SLB and cannot be used with the old style extractors. 
  • MUST be used with new style Loaded Chamber Indicator.
  • 40 S&W & 357 Sig extractor 1899 uses SLB 3439.
  • 45 GAP extractor 1902 uses SLB 3439.
  • Part number 7 on the schematic. 

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  • 5
    Lone wolf is the best in the game.

    Posted by Harry on 24th Oct 2023

    I built me a g23 and G27L. I had extremely difficulty finding reasonable priced parts for this .40 cal model I was having a lot of feeding issues firing pin tips snap etc. Once I put all the lone wolf upper in I went to have zero issues. If you looking for well design quality parts lone wolf is the way to go.