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9/22/2017 12:11:25 AM
Posted: 9/13/2005 6:56:56 PM EDT
I bought my AR rifle during the mid 90's, as a parts gun. The lower is an Eagle Arms EA-15 (Coal Valley), and it is mated to an unmarked A1 receiver and 20" barrel. The rifle functions just fine, but I thought I would "upgrade" it by replacing the upper with a newer type. I tried test-fitting a Rock River upper this evening, but the two pin holes did not match up, and there is a noticeable gap between the two sections. Does anyone know what brand upper should fit with this lower?
thanks in advance.
Link Posted: 9/13/2005 7:10:23 PM EDT
You will have to actually try them.. Most SHOULD fit, but if they dont you can always work the upper a bit to make it fit..

Dont modify the lower.. Work on the upper.
Link Posted: 9/13/2005 7:14:58 PM EDT
I could be wrong, but for a while RRA uppers were having trouble fitting other brands of lowers. I've read about this a million times, and we had to do a little work to get my dads upper to fit his E.A. (Essential Arms, not Eagle) lower back in the ban days. I think most other brands should work. YMMV.
Link Posted: 9/13/2005 7:19:17 PM EDT
I have a Coal Valley Eagle arms lower, excellent quality.

All in spec uppers should work.

Thus far I have tested the following on mine

Bushmaster A3
Colt A2
CMT A3

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