Rear Take-Down Pin on an AR-9

Discussion in 'Gunsmithing - Assembly - Finishing' started by KnotRight, Nov 6, 2019.

  1. KnotRight

    KnotRight Well-Known Member Charter Member Benefactor Life Member

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    After 3 months, I got my Palmetto State Armory AR-9 lower in and went to install the rear take down pin. There is not a hole in back of the lower to insert the detent or spring.
    Any ideas what is going on or how to install the detent?
     
  2. KnotRight

    KnotRight Well-Known Member Charter Member Benefactor Life Member

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    Thanks Big Waylon.
    It was in the bottom of the lower and not in back as you said. Much easier it the spring and detent was in back. It is a PIA to try to compress 2 springs and slide the pistol grip on especially when the pistol grip is VERY tight and you have a hard time sliding it on the frame.
    Now if I just remembered to buy a castle nut I would have the gun complete.
     
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  3. Tim

    Tim I am....an enchanter. Staff Member Benefactor Charter Life Member

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    Grease.

    Coat the springs in grease , insert in receiver and they stick place while you work.
     
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  4. 49erRider

    49erRider Member

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    I actually really like the idea of it being compressed by the grip. I thought it much easier when assembling. To each their own I guess.
     
  5. KnotRight

    KnotRight Well-Known Member Charter Member Benefactor Life Member

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    49erRider all my other AR lowers except the AR-9 16" I have drilled and trapped the rear takedown spring and detent with an Allen screw. Thinking when I take the gun apart for the first cleaning I might do that to this one. That way you do not have to worry about the spring flying out or bending it when putting the gun back together.