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Posted: 10/14/2004 3:53:19 AM EDT
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I saw on here somewhere at some point someone was asking about which "big name" manufacturer's lowers were the same as Stag lowers. The quote below is from an email from Eagle Firearms: "The Stag lowers are exactly like the RRA lowers, made by the same company." |
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Stag, Rock River, and Century are ALL made by Continental in Connecticut, and they're all the same except for the stampings on the side. They even have the same prefix "CM" in front of the serial number. As far as one brand being tighter than another, not really so. It just depends on what piece you get, no matter what brand name is on it. There's a certain amount of varience in all production pieces, and the Continental lowers seem to have a bit more than some others in the inner (and outer) width area. Not all that much; just a couple of thousanths. But that's enough to make the difference in early use feel when you open and close the pieces. The looser ones are snug; the tighter ones are really tight until you've used them a bit. Works out either way 
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AR lowers have a tolerance of .015 inches. That means any dimension in the lower can be within .015 of an inch and everything should still work accordingly. The best manufactuered parts are of course much closer to the intended measurments. This is why certain lowers don't always fit well with certain uppers. If one company consistently puts out uppers that are "tighter" (meaning the actual specs are more than the intended ones), and the upper is attached to a "looser" lower (or any variation of the two) you might run into some play. With that said, certain runs of a lower might be "tighter" due to newly sharpened drill bits, made by a different CNC machine, etc. while others might be "looser", even if they are made by the same company. So, get a lower, get an upper, put them together, and if they're some play, get an Accuwedge or a tension pin. |
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