Rear Take-Down Pin on an AR-9

[KnotRight]

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?

 

[KnotRight]

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.

 

[Tim]

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.

Grease.

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

 

[49erRider]

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.

 

[KnotRight]

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.

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.