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Posted: 8/28/2004 5:33:29 AM EDT
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Just built a couple of RRA lowers. Tried several non-RRA uppers and all will require some fitting. Do new RRA uppers fit new RRA lowers without fitting? I'd rather not modify a bunch of uppers that fit perfectly on my other lowers just to fit these new RRA's. Might just get a couple of dedicated uppers for the RRA's and was wondering if RRA lowers fit RRA uppers without fitting. |
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Ditto on the mallet. I had to use a block of wood and a hammer to get them together and apart. Its also a pain to get them apart, to the point where I'm considering some dremel action. It was tight with two different RRA uppers and a Colt upper. Hopefully a couple hundred rounds will loosen her up. |
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The RRA lowers that I've owned haven't been relieved in the back for the upper's rear lug. Hard to explain without a picture, but the radius wasn't opened up at the very back to allow the lug to drop in and out freely. It only requires a small amount of filing/shaping on the very rear sides of the upper's lug, but I don't think that should have to happen- I think RRA should open the cavity a little instead. |
Yup, that's exactly what I've experienced. Kinda disappointed. How do they fit their uppers on their factory guns? |
| Thanks for the info. I went ahead and shaped the rear lug on one upper (CMT) mainly to see how much it would take. As mentioned above, it didn't take much but I wasn't too happy about the whole idea. These were my first two RRA lowers and probably my last.hinking.gif Got a bunch of Ameetec's on the way |
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