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Posted: 3/25/2017 4:33:31 PM EDT
[#1]
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Posted: 3/25/2017 5:20:23 PM EDT
[#2]
Smiling, I live there and it is a great reference site. I question whether or not the details are correct on that one or I am missing something. I though there was a hole below the port door as an example.
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Posted: 3/25/2017 5:25:18 PM EDT
[#3]
 Attached File601 upper receiver: - Forge flash removed from inside of carry handle - Tiny hole under ejection port for door spring "leg" - Beaver tail above charging handle has distinct angles - "R" and arrow not marked at the rear sight area (it's on the sight wheel instead) - Area at the bottom rear of the ejection port profiled to [basically] match profile of lower receiver - "Square forge" at top front of ejection port - Front lug (for pivot pin) rebated on left side John Thomas |
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Posted: 3/25/2017 5:33:45 PM EDT
[#4]
Quote HistoryQuoted:
- "R" and arrow marked at the rear sight area John Thomas |
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Posted: 3/25/2017 11:57:12 PM EDT
[#5]
Thank you, that was what I was looking for. Should I assume that there are no differences on the other side? I have a square and a round slick side uppers both with rebated lugs. I was wondering what it would take to make them into 601 clones. I have been looking for quite some time for real ones.
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Posted: 3/26/2017 1:23:25 AM EDT
[#6]
Quote HistoryQuoted:
Thank you, that was what I was looking for. Should I assume that there are no differences on the other side? I have a square and a round slick side uppers both with rebated lugs. I was wondering what it would take to make them into 601 clones. I have been looking for quite some time for real ones. 
Even though they made a lot, they didnt make 604 uppers for that long. Six or seven years tops. |
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Posted: 3/26/2017 4:04:52 PM EDT
[#7]
Quote HistoryQuoted:
Any chance you could get a modern one to chop up?
Even though they made a lot, they didnt make 604 uppers for that long. Six or seven years tops. Quote HistoryQuoted:
Quoted:
Thank you, that was what I was looking for. Should I assume that there are no differences on the other side? I have a square and a round slick side uppers both with rebated lugs. I was wondering what it would take to make them into 601 clones. I have been looking for quite some time for real ones.
Even though they made a lot, they didnt make 604 uppers for that long. Six or seven years tops. |
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Posted: 3/26/2017 4:19:03 PM EDT
[#8]
Quote HistoryQuoted:
I'm not a fan of cutting up original Colt parts, but I'm also getting tired of looking and getting outbid for an original. The thing is the rifles I intend to use these on will never be 100% original and the 601 uppers just don't seem to come up any more. The square forge looking one I have appears to be refinished and I don't see any Colt proof marks on that one. The round forge still has black lugs. |
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Posted: 3/26/2017 4:34:37 PM EDT
[#9]
Or, buy a cheap SP1 upper and use that. There are currently lots of SP1 uppers available, due to the rifles being torn down for parts.
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Posted: 3/26/2017 7:11:11 PM EDT
[#10]
The last time I looked Fulton did not even list the slickside upper on their site anymore except for the complete legacy upper assy. It showed as out of stock for a long time and then it was gone.
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Posted: 3/26/2017 10:09:34 PM EDT
[#11]
Quote HistoryQuoted:
The last time I looked Fulton did not even list the slickside upper on their site anymore except for the complete legacy upper assy. It showed as out of stock for a long time and then it was gone. I've been waiting on them to come back in stock for about 6 months, now they aren't even listed anymore. 
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Posted: 3/27/2017 2:45:11 AM EDT
[#12]
Quote HistoryQuoted:
The last time I looked Fulton did not even list the slickside upper on their site anymore except for the complete legacy upper assy. It showed as out of stock for a long time and then it was gone. |
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Posted: 3/27/2017 8:43:38 AM EDT
[#13]
I have been looking at the pictures I can find of these "new square forge" uppers. I believe one that I have is one of them. Black, square, no Colt proof marks and no casting marks. As much as I understand and agree with the debate. At the end of the day, I would rather spend the additional funds on modifying what I own, rather then pay twice to buy another slick side. I see them on EE from $150 to $200. I already own at least five of slick side uppers. Two were bought as place savers for my 601 projects. I bought this last one as a no name for just this reason of possibly modifying it. Now that handles one of the two I need, so I will think hard before I do it to a Colt proofed upper.
Thanks for all the feedback. I now know exactly what I should be looking for in a 601 upper and what would need to be modified if I choose to go that route. |
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Posted: 3/27/2017 11:16:31 AM EDT
[#14]
I can take detailed pictures of my Fulton slickside upper if you want
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Posted: 3/28/2017 1:37:50 PM EDT
[#15]
Quote HistoryQuoted:
I have a few I'd be willing to part with. I too am trying to build a 601. I have a complete sp1 upper (w/sight and door). For almost two years I've tried but just can't bring myself to modify it.  if a person got a Fulton upper. What would be the best way to strip the cerikote as to help promote anadization after modification?
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Posted: 3/28/2017 1:43:55 PM EDT
[#16]
Quote HistoryQuoted:
Just looked at their site and same goes for the slick side, chrome BCG's. I've been waiting on them to come back in stock for about 6 months, now they aren't even listed anymore. Inquiring about your Bolt Carrier, M16/AR15, Chrome, No Forward Assist Notches, with Chrome Gas Key. Part #: FA-AU-182-k Are they coming back to your store? Do you have a time frame? Thanks, Marc Hey Marc, We’re still carrying them but I don’t have an eta, check back in the summer Regards, Clint Jr. Sales/Customer Service/Webmaster Fulton Armory 8725 Bollman Place, Suite #1 Savage, MD 20763 P (301) 490-9485 F (301) 490-9547 Fulton-Armory.com [email protected] |
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Posted: 4/1/2017 1:40:58 AM EDT
[#17]
Fulton upper pics
 Attached File Attached FileNever noticed it before but what's with the small hole under the sight on the left side? |
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Posted: 4/1/2017 6:08:38 AM EDT
[#18]
Quote HistoryQuoted:
Fulton upper pics https://www.AR15.Com/media/mediaFiles/123535/IMG-4429-178404.JPG https://www.AR15.Com/media/mediaFiles/123535/IMG-4430-178405.JPG Never noticed it before but what's with the small hole under the sight on the left side? |
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Posted: 4/1/2017 10:16:29 AM EDT
[#19]
Quote HistoryQuoted:
Smiling, I live there and it is a great reference site. I question whether or not the details are correct on that one or I am missing something. I though there was a hole below the port door as an example. |
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Posted: 4/1/2017 5:09:07 PM EDT
[#20]
Quote HistoryQuoted:
There is a hole, it just isn't visible under the ejection port cover. |
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Posted: 4/1/2017 5:19:19 PM EDT
[#21]
BTW, one of the two I have is like this, the other is Colt
http://www.ar15.com/forums/t_7_22/1629927_WTS---Retro-Slickside-604-A1-Upper-Receiver----175.html |
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Posted: 5/26/2017 12:20:01 AM EDT
[#22]
Quote HistoryQuoted:
One of those cerakoted Fulton Armory slickside receivers would be the better choice for modifying. And they're square forge. You could remove the forge markings, remove the sight wheel arrow, and profile the area underneath the port door to line up with the lower receiver, then refinish, and you wouldn't be altering an original part. As for the lack of proof marks, Colt was the only manufacturer to make slickside upper receivers, so if it is an original receiver, it is Colt. Quote HistoryQuoted:
Quoted:
I'm not a fan of cutting up original Colt parts, but I'm also getting tired of looking and getting outbid for an original. The thing is the rifles I intend to use these on will never be 100% original and the 601 uppers just don't seem to come up any more. The square forge looking one I have appears to be refinished and I don't see any Colt proof marks on that one. The round forge still has black lugs. |
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Posted: 5/26/2017 8:09:00 AM EDT
[#23]
Quote HistoryQuoted:
Turns out the Fulton Armory uppers are not good candidates to turn into 601 uppers... the hole in the upper at the back side of the sight wheel screw needs to be filled. |
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Posted: 5/26/2017 8:23:56 AM EDT
[#24]
For some reason, there is a small extra hole drilled all the way through to the back side of the detente hole. It appears it is on all of them.
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Posted: 5/26/2017 11:14:14 AM EDT
[#25]
Who can reprofile drill spring hole and engrave them if someone wanted to convert a 604 to a 601 or 602 upper?
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Posted: 5/26/2017 1:26:10 PM EDT
[#26]
Quote HistoryQuoted:
For some reason, there is a small extra hole drilled all the way through to the back side of the detente hole. It appears it is on all of them. |
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Posted: 5/26/2017 1:30:07 PM EDT
[#27]
Quote HistoryQuoted:
Who can reprofile drill spring hole and engrave them if someone wanted to convert a 604 to a 601 or 602 upper? |
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Posted: 5/26/2017 4:24:17 PM EDT
[#28]
Quote HistoryQuoted:
Probably braceman. Quote HistoryQuoted:
Quoted:
Who can reprofile drill spring hole and engrave them if someone wanted to convert a 604 to a 601 or 602 upper? |
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Posted: 5/26/2017 9:23:07 PM EDT
[#29]
Quote HistoryQuoted:
Who can reprofile drill spring hole and engrave them if someone wanted to convert a 604 to a 601 or 602 upper? |
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Posted: 5/26/2017 9:43:37 PM EDT
[#30]
Can you anodize two that the work has been already done on?
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Posted: 5/26/2017 10:09:38 PM EDT
[#31]
Yes i can.
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Posted: 6/15/2017 9:39:12 AM EDT
[#32]
Next step I anodizing...
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Posted: 6/15/2017 12:36:02 PM EDT
[#33]
Who did the work on those?
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Posted: 6/15/2017 3:30:45 PM EDT
[#34]
Both John Thomas and Braceman (others I'm sure) are able to do this type of modifications. In my case, Braceman did this work for me.
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Posted: 6/15/2017 3:38:23 PM EDT
[#35]
Ok sent them both emails. Are you using both of yours?
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Posted: 6/15/2017 3:47:05 PM EDT
[#36]
Yes, I need one for my brown 601 and I am building a BFPU 601 with the other.
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Posted: 6/15/2017 3:49:53 PM EDT
[#37]
Ok cool did they strip the anodizing off as well?
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Posted: 6/15/2017 7:31:46 PM EDT
[#38]
Yes, one was anodized and the other with the extra hole was cherokoted. It was a poor candidate for the machine work.
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