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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