ar15 loose fit at pivot pin

[Prestantia]

Hi everyone,
I just finished an ar build, using an old colt upper for fun. Once I assembled it I found that there is a LOT of play between upper and lower. Not just a little but more like a whole 1/16" or more! After inspecting, i found that the pivot pin hole in the UPPER is oversized. I know that there are things that snug up the fit at the back of the receiver by the take down pin (accuwedge, etc.) but is there anything I can do to tighten up the fit at the pivot pin? Any help would be appreciated. Thanks!

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[iamme]

Sounds like a large pin colt upper.

 

[deadeye]

I believe this is where the offset pins normally come in handy, but you have the opposite problem so try this........Colt Bushing: American Spirit Arms - Precision Firearms - AR15, M16 Rifle, M4 Carbine

 

[DoubleTapDrew]

+1 sounds like a big pin colt upper. There are adapters like deadeye posted to take care of the problem.

 

[Burt Gummer]

Or get one of those KNS pins that you have to push a center button in order to remove ...