AA Optics

a2 front sight base

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    1. HamYankee

      AR FSB (.625) vs (.750)

      Regarding the two diameter types, is there any disadvantage to one or the other?
      • HamYankee
      • Thread
      • a2 front sight base fsb gas block
      • Replies: 5
      • Forum: Long Guns
    2. C

      AAC 300 blackout barrel + A2 front sight base=

      I have been contemplating possibly purchasing an AAC 300 blackout barrel to swap out with my Colt LE6920 stock barrel. My question for the forum members is if anybody knows if the AAC 300 blackout barrel profile will fit my stock A2 front sight base and gas block. I am not interested in...
      • cpsiddall
      • Thread
      • 300 blackout a2 front sight base ar15 barrel colt le6920
      • Replies: 4
      • Forum: Long Guns
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