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Posted: 4/30/2020 10:43:33 PM EDT
Not sure if I ever noticed this on other builds. I’ve built on Colt, Mckay, NoDak. Got two Palmetto lowers for Geissele URGI builds and saw a pronounced cant in the selector. LPKs are Aero Precision. I swapped in a Colt M16 selector for comparison. Am I SOL, or is there a simple solution to correct the cant. Thanks
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Posted: 4/30/2020 10:49:25 PM EDT
[#1]
The detent hole not being exactly at 6 o'clock position would cause that. Looking at your pic it looks like that might be the issue, but hard to say for sure from a photo.
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Posted: 4/30/2020 10:52:44 PM EDT
[#2]
Mine is like that also, I actually prefer it, as it stops the selector from beating up the stops.
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Posted: 4/30/2020 11:04:30 PM EDT
[#3]
I’m not sure I care enough to do anything about it. It’s just the first I’ve ever noticed and thought at first it was the selector.
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Posted: 5/1/2020 7:09:30 AM EDT
[#4]
One of mine is like that can’t remember if it’s the m4 or the m16a2
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Posted: 5/1/2020 7:13:18 AM EDT
[#5]
Quote HistoryOriginally Posted By mak0: The detent hole not being exactly at 6 o'clock position would cause that. This. I had one like that, bothered the shit out of me so I sent it packing. |
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Posted: 5/1/2020 1:02:35 PM EDT
[#6]
I’m not sure who manufactured these lowers but quality control isn’t that great. I have a psa m16a2 marked lower all my uppers have a wobble on it. It’s within military spec tolerances but none of my uppers wobble on any of my other brand lowers. Bothers me to be honest because I should have to use an accu-wedge just to remove wobble.
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Posted: 5/1/2020 3:54:23 PM EDT
[#7]
Quote HistoryOriginally Posted By waynelte: I’m not sure who manufactured these lowers but quality control isn’t that great. I have a psa m16a2 marked lower all my uppers have a wobble on it. It’s within military spec tolerances but none of my uppers wobble on any of my other brand lowers. Bothers me to be honest because I should have to use an accu-wedge just to remove wobble. PSA forges/ machines them. |
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Posted: 5/1/2020 10:10:17 PM EDT
[#8]
Quote HistoryOriginally Posted By Tigwelder1971: PSA forges/ machines them. Quote HistoryOriginally Posted By Tigwelder1971: Originally Posted By waynelte: I’m not sure who manufactured these lowers but quality control isn’t that great. I have a psa m16a2 marked lower all my uppers have a wobble on it. It’s within military spec tolerances but none of my uppers wobble on any of my other brand lowers. Bothers me to be honest because I should have to use an accu-wedge just to remove wobble. PSA forges/ machines them. Well they did a bad job. Quality control isn’t there. |
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Posted: 5/1/2020 10:15:29 PM EDT
[#9]
Quote HistoryOriginally Posted By waynelte: Well they did a bad job. Quality control isn’t there. Quote HistoryOriginally Posted By waynelte: Originally Posted By Tigwelder1971: Originally Posted By waynelte: I’m not sure who manufactured these lowers but quality control isn’t that great. I have a psa m16a2 marked lower all my uppers have a wobble on it. It’s within military spec tolerances but none of my uppers wobble on any of my other brand lowers. Bothers me to be honest because I should have to use an accu-wedge just to remove wobble. PSA forges/ machines them. Well they did a bad job. Quality control isn’t there. I will not argue. Too bad too as I was on the fence, just about had myself convinced to order one. (Been mulling it since December). PSA has just become too large of a gamble. |
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Posted: 5/2/2020 2:36:21 AM EDT
[#10]
Detent channel for selector pin was not milled correctly. Best bet is to send the lower receiver back for replacement. Short of that, can be resolved at the selector by re- machining the detent pin locations in the needed positions, as well as making the detent channel slightly deeper as well. Hence, will need to use a carbide bit since the selector is hardened to HSS already, and then there is having to make a new selector detent pin that is slightly longer to work with the slightly deeper selector channel and detent position. Bluntly, short of a Form 4 M-16 receiver that you are trying to save since there is no replacing it, just not cost effective to try to save/correct a bad machined Semi lower that is less than $100 to start with. |
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Posted: 5/2/2020 2:24:05 PM EDT
[#11]
Yep. A real bummer. Dropped serious coin on Geissele URGI only to have a sloppy lower. I’ll probably test a few selectors to see if I can minimize it to where it’s tolerable.
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Posted: 5/2/2020 3:45:57 PM EDT
[#12]
Quote HistoryOriginally Posted By rbgonoles: Yep. A real bummer. Dropped serious coin on Geissele URGI only to have a sloppy lower. I’ll probably test a few selectors to see if I can minimize it to where it’s tolerable. Send it back. |
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Posted: 5/3/2020 11:54:04 AM EDT
[#13]
Ok. So I tested several selectors and and pins and found a long arm of an UnbrandedAR LPK that seems to mitigate the cant.
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Posted: 5/9/2020 11:11:42 PM EDT
[#14]
Looks like you’re now GTG!
My M4A1 lower has the largest front take down lily ever hole I’ve ever seen; silly, but a total buzzkill for me. As said earlier, with current demand, QC is down for now |
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Posted: 5/9/2020 11:40:04 PM EDT
[#15]
Quote HistoryOriginally Posted By waynelte: I’m not sure who manufactured these lowers but quality control isn’t that great. I have a psa m16a2 marked lower all my uppers have a wobble on it. It’s within military spec tolerances but none of my uppers wobble on any of my other brand lowers. Bothers me to be honest because I should have to use an accu-wedge just to remove wobble. I have the original stealth lower and it's perfect. Finish and fit. Came with tension hole too. Love the roll Mark. But they were made by someone else because I purchased another not long ago and I can tell it's no where near the same high quality. PSA is turning there own lowers and qv is suffering. I'm sure they will get better with age. I'm almost positive my original stealth lower I form 1d was made by aero |
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