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Posted: 2/25/2015 9:04:26 PM EDT
[#1]
I'll check my Colt tonight, but iirc the cam pin cut out needs to be there too?
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Posted: 2/25/2015 9:16:06 PM EDT
[#2]
Some 9mm Uppers also lack the cam pin notch, which is a bigger deal than the gas tube hole, but still not impossible to overcome. Some have the notch anyway.
This one appears to be lacking that notch. Compare to this: 
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Posted: 2/25/2015 9:20:29 PM EDT
[#3]
shows how much I know, didn't even think of the notch.
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Posted: 2/25/2015 9:23:01 PM EDT
[#4]
That's funny. The third pic appears to have the external bump for the cam pin. Or am I seeing that wrong? There is a bump, but its not milled inside?
But thanks for the heads up! |
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Posted: 2/25/2015 9:28:38 PM EDT
[#5]
The bump is part of the forging for the rough blank upper. Cheaper to leave that in than make whole new dies for an otherwise barely changed 9mm upper. The notch on the inside is an extra milling step that's not needed for 9mm, so it's cheaper to leave it out.
However, this picture seems to show the lower rail having the notch. There's no reason they would only partially do that milling process, so it's possible some of these have the notch and some do not. 
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Posted: 2/25/2015 9:29:39 PM EDT
[#6]
Anyone know if NDS is still making going to make more 9mm marked lowers? I'm thinking of peddling mine to pay for some advertising. I kind of hate to if they aren't.
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Posted: 2/25/2015 9:31:26 PM EDT
[#7]
They do not. I was in line for one, but ended up having to go with an A1 lower when they ran out of the last of them.
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Posted: 2/27/2015 6:45:49 AM EDT
[#8]
Oh God I was hoping no one would notice these until I could buy one. Thanks for spilling the beans and ruining my plan....
: ( Posted Via AR15.Com Mobile |
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Posted: 2/27/2015 11:40:55 AM EDT
[#9]
Why has that ruined anything for you? It's not an auction that someone took out from under you. It's a product, on a website, which they seem to have multiples of. . . ?
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Posted: 2/27/2015 12:14:38 PM EDT
[#10]
Quote HistoryQuoted:
Why has that ruined anything for you? It's not an auction that someone took out from under you. It's a product, on a website, which they seem to have multiples of. . . ? I was joking. Posted Via AR15.Com Mobile |
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Posted: 2/27/2015 12:28:34 PM EDT
[#11]
Quote HistoryQuoted:
I was joking. Posted Via AR15.Com Mobile Quote HistoryQuoted:
Quoted:
Why has that ruined anything for you? It's not an auction that someone took out from under you. It's a product, on a website, which they seem to have multiples of. . . ? I was joking. Posted Via AR15.Com Mobile LOL. I was sitting here wondering if you were serious or not. Probably should have used a  followed by a  or .......and I'll leave with a 
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Posted: 2/27/2015 1:06:49 PM EDT
[#12]
Yeah sorry. I don't know how to do emoticons easily on the arfcom mobile version.
Anyway, I was gonna see if one of the resident retro machinists/smiths could do the cam pin cut later if necessary. Posted Via AR15.Com Mobile |
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Posted: 2/27/2015 1:21:06 PM EDT
[#13]
I just looked at one of my old uppers, and it looks like the radius of the pin cut is slightly larger than a 5/8" endmill. The cut is also corner radiused in the very bottom, or top if the receiver is in the "as used" position. That would require an endmill that has a corner radius on it. Wouldn't be too hard to do. I wonder if just plunging a 5/8" endmill would be sufficient clearance, or if you'd have to interpolate the cut to get it to exactly the size of an original cut.....looks like the diameter of the pocket might be about .650 or so instead of .625.
There are any number of machinist here that could do that, me included. Question I have would be if there is enough wall thickness to get the cut to the same depth that is on an upper that does have that cut.........wouldn't want to break out the top/side of the receiver. That cut is the reason for having the rectangle boss on the outside of the left side of the receiver. |
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Posted: 2/27/2015 1:28:25 PM EDT
[#14]
Maybe Mike or Harlan could weigh in here?
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Posted: 2/27/2015 2:09:20 PM EDT
[#15]
I have one of those uppers but with large front hole.
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Posted: 3/1/2015 12:26:35 AM EDT
[#16]
We did not put the gas tube hole or cam pin cut on the 9mm uppers we made.
But they sold so poorly that we ended up putting the remaining "in the white" inventory back on the CNC to turn them into 604's. As far as NDS-635 lowers, we won't be doing any more of those either. They only reason we were able to sell them was the panic buying after Sandy Hook. |
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Posted: 3/1/2015 2:38:32 AM EDT
[#17]
I guess that makes me one of the few along with Morg who owns the NDS 635 lower and upper. It is a nice set to have. Need to get my forms submitted for that DOE now that I am a bit more solvent.
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Posted: 3/1/2015 10:06:49 AM EDT
[#18]
 heres my colt 9mm project.
. |
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Posted: 3/1/2015 4:27:50 PM EDT
[#19]
Lookin' good. Here's your 9mm's cousin:
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Posted: 3/1/2015 7:41:47 PM EDT
[#20]
I have an old large hole Colt 9mm upper that someone converted for use to 5.56 by drilling a hole for the gas tube and using a mill for the cam pin notch. I assume that it worked without issue and I may in fact use that upper for 12.5" lightweight build in the future. Still sitting in the parts bin for now.
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Posted: 3/1/2015 7:55:31 PM EDT
[#21]
Quote HistoryQuoted:
Lookin' good. Here's your 9mm's cousin: http://i1239.photobucket.com/albums/ff502/photocumulus/AR15Com/635Right.jpg im jelly! |
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Posted: 3/1/2015 9:31:15 PM EDT
[#22]
Quote HistoryQuoted:
im jelly! Quote HistoryQuoted:
Quoted:
Lookin' good. Here's your 9mm's cousin: http://i1239.photobucket.com/albums/ff502/photocumulus/AR15Com/635Right.jpg im jelly! Details on yours: Your magblock is pinned, Y/N? What are you plans for bolt carrier? DOE? |
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Posted: 3/1/2015 9:59:48 PM EDT
[#23]
dont mean to override op's thread. but its pinned mag block once i know it works in gonna sbr and can it with a slide fire.using colt unramped bolt and colt 9mm trigger
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Posted: 3/1/2015 11:54:53 PM EDT
[#24]
Quote HistoryQuoted:
Lookin' good. Here's your 9mm's cousin: http://i1239.photobucket.com/albums/ff502/photocumulus/AR15Com/635Right.jpg You sure could use a DOE barrel assembly for that fine build liemohnmanufacturing.com has got some
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Posted: 3/2/2015 8:31:03 PM EDT
[#25]
Quote HistoryQuoted:
You sure could use a DOE barrel assembly for that fine build liemohnmanufacturing.com has got some
Quote HistoryQuoted:
Quoted:
Lookin' good. Here's your 9mm's cousin: http://i1239.photobucket.com/albums/ff502/photocumulus/AR15Com/635Right.jpg You sure could use a DOE barrel assembly for that fine build liemohnmanufacturing.com has got some
Linky no worky? 
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Posted: 3/2/2015 8:33:59 PM EDT
[#26]
Quote HistoryQuoted:
Linky no worky? Quote HistoryQuoted:
Quoted:
Quoted:
Lookin' good. Here's your 9mm's cousin: http://i1239.photobucket.com/albums/ff502/photocumulus/AR15Com/635Right.jpg You sure could use a DOE barrel assembly for that fine build liemohnmanufacturing.com has got some
Linky no worky? http://liemohnmfg.com/ |
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Posted: 3/2/2015 8:35:44 PM EDT
[#27]
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Posted: 3/3/2015 1:33:38 AM EDT
[#28]
Getting back to OPs point - That looks like a nice little 9mm upper, all square forgey and all. Kinda pricey, but there aint many others on the market right now.
Thanks for the feedback. I been waiting to do my paperwork, then its probably a Liemohn DOE. |
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