Posted: 4/11/2008 8:48:21 AM EDT
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Steve, I'm going to be building my second AR, and this one is going to be an "accuracy gun." About a year ago, I bought two RR lowers and one fully assembled RR upper. Built the first using the assembled upper -- I'll call this AR#1. Just recently I got a striped RR upper to go with the other RR lower for building the accuracy gun, which I’ll call AR #2. The fit between the receive halves on AR#1 is very solid -- no play whatsoever. (And the thing shoots VERY WELL). When assembling the striped receiver halves of AR# 2 (with only the take-down pins in place), there is SOME play -- not a lot. I've swapped uppers and lowers back and forth between AR#1 and AR#2, and the play definitely follows the newer striped upper (#2). These two uppers were apparently made at different foundries. AR#1 has the "keyhole" mark. #2 has a weird mark that I can't even describe (I have a pic but don't know how to post it). My question is this: If I were to get another striped RR upper -- one with the keyhole mark -- could I reasonably expect them to fit tightly together? Or, alternately, RR catologs a set that is refered to as a "National Match" receiver set, but they show an 8-12 month wait. Any chance of getting a set quicker then that? Thanks. |
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I have a RRA varmint rifle and it is a loose fit. I took it back to the gun shop where I bought it and they said some just come that way. When I had the barrel threaded for a suppressor the gunsmith couldn't believe that it was a RRA rifle because they are known for being tight. He asked if i wanted an accuwedge or him to drill a set screw in the receiver to firm it up. I've left it as is and it shoots fine. when my friends and family looked at it they weren't impressed by the looseness, but after they shot it they were happier. |
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I hear about them from time to time, but have never seen a "loose" factory rifle, as the upper half and lower half are fit for relative tightness when they are assembled. It'sd a completely different story with seperate uppers and lowers. Often times they'll be just as snug as complete rifles. other times, due to tolerance stacking, some will exhibit some degree of "looseness"...generally not as loose as some new factoory rifle...but looser than one of our factory builds. We can't check fit on seprate components, and occassionally an upper or lower will be at one end of the tolerance and the corresponding upper or lowe rthat they are matched with will be at the other end....making them fit a little looser. Some times they'll both be too tight. If you want to set up a returnauthorization through our Sales/Customer Servic edepartment (866-980-7625) there are a few tricks we xcan do to tighten the fit of a given upper and lower, but I can't make any promises. The hold up on the matched sets is the stripped lowers. We're way behind on them in that configuration and have been for months. While it does show some signs that we'll be able to make major steps towards catching up within the next few months, Ican't make any promises on when we wouldbe able to ship to meet a new order for a matched set. Steve/RRA |