Posted: 4/30/2008 5:57:11 AM EDT
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About 4 years ago I picked up a few RRA lowers and really had to look them over because the "ears" that held the trigger guard roll pin were not centered on many of them and one "ear" was much thinner than the other. I eventually found some that had "ears" that were pretty close to the same thickness. When perusing some of the local dealers inventory recently looking to pick up a couple of more RRA lowers, I noticed the same issue again - the "ear" on one side was not much thicker than a business card or two, while the other "ear" appeared to be huge - almost 1/4" thick. I looked at about 20+ lowers and they were all the same - one thick ear and one thin ear. Before I give up and go with another brand, I was wondering what might be going on that is causing this unevenness. I don't want to risk breaking a thin "ear" off while driving the trigger guard roll pin and being stuck with a $175 RRA paperweight. |
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I'll get some dimensions and tolerances from my engineers and some measurements from lowers and see what's up. I know we aren't breaking trigger guard ears off with any kind of frequency, so I don't think that there's anything to worry about, but I'll try to see what I/we can come up with. Steve/RRA |
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I know what the OP is talking about, an dI also know it can't be a 1/4" on the one side (doesn't have enough material to still have a gap for the guard if it were that wide)...but there have been and are differences. I just have to get the engineering drawings and see what the tolerances are. And, as I said earlier and checked back (again) with my guys who build lowers. We've had one broken ear inthe last couple of months (most likely human error, not a bad ear), so even if there is a difference in the thicknesses, it isn't causing installation nightmares or paperweight collections. We don't have a special fixture or anyhting to install them...we just start 'em with a pin starter and then drive them the rest of th eway through. Steve/RRA |
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Some would say I do a good enough job looking like a big enough idiot without really having to do anything at all. I didn't want to look like an even bigger idiot at the gun show snapping pics of a bunch of lowers from different dealers. Needless to say, the one ear wasn't really 1/4" thick, but the difference was very large on most of the recent ones I've seen. The thin ear has been quite thin, easily less than half the thickness of the thicker ear. Admittedly, I'm not an expert on lowers, but I haven't seen this phenomenon to the same degree on any other branded lowers, which is why I wanted to ask here. If you look closely at the ears, any difference should stand out pretty readily. Also, I wasn't trying to insinuate that it would necessarily be easier to break off the thinnerears, but to me, it's more of a psychological thing. I just feel better when the machining is centered and the ears are nearly identical thickness when I'm hammering in that pin. |