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Building an AR that takes Glock magazines?  Well here is your ticket!  Like the DB1015, this block can be used for two different platforms.  The Glock small frame (9mm/40cal) flip it over and build or work on your Glock large frame (45acp/10mm)!  Tightest lockup of any block out there without having to "fit" it to work!  Stop ruining your mags!!

*Fits most receivers

LIFETIME GUARANTEE! No questions asked


SKU: DB945
  • Send us a picture of your broken Duo Block, we will send one out immediately!

  • Yes we can brand the Duo Block for you for an additional fee!  Please contact us for details!

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