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  1. General Glocking
    I have a Glock G21-G4 and have seen G21SF and G21-G3's at internet stores, my question is - is the difference between the G21 and G21SF related to the capacity of the magazine (10 vs 13) or are the frame (slide) lengths and/or widths different? What is the difference between the G21-G3 and the...
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