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3/24/2013 9:41:56 AM EDT
I have a pre-ban Colt AR-15 A2 Sporter II and I wanted to confirm a part that I need. In order for me to attach the upper, I need a receiver adapter. Will this work for what I want to do?

Receiver Adapter

I appreciate the help.

-Chris
3/24/2013 1:51:50 PM EDT
[#1]
Chris just give Brownells a call.  They will be glade to help you get the right part.
3/24/2013 4:49:26 PM EDT
[#2]
I presume what you intend to do is install a .250" pin upper on a large pin Colt lower??
3/24/2013 6:25:46 PM EDT
[#3]
We need some more info. What upper are you using, and what lower are you using?
3/24/2013 6:56:01 PM EDT
[#4]
Yes, that will let a Ml Spec small hole fit your large hole Colt. This will make a large hole Colt upper fit a Mil Spec lower.
http://www.brownells.com/rifle-parts/receiver-amp-action-parts/receiver-hardware/receiver-bushings/ar-15-m16-pivot-pin-adapter-bushing-prod24949.aspx
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