Fn five seven

Discussion in 'Semi-Auto Handguns' started by dunn, Jun 30, 2013.

  1. dunn

    dunn New Member

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    Does anyone know if you can use the extension spring on the 10 round magazine. All reviews I see you can use it on the 20 round to make it 30. Would that work with the 10 round mag?
     
  2. SSGN_Doc

    SSGN_Doc Well-Known Member

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    If it is a ten round mag for use in states with 10 round capacity restrictions, it probably has some other block incorporated to prevent alteration to higher capacity. But I don't know for sure. The only mags I've seen in person were the standard mags.