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Posted: 12/17/2011 8:56:00 PM EDT
Guys trying to figure out if this upper I got in trade for some work is a 733 or ?
I also got the coated metal stock with the upper. I know the moderator is not correct and is an aftermarket piece. But the rest from my research seems to be close to a real 733 upper. |
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Posted: 12/18/2011 2:30:04 AM EDT
[#1]
It's not factory, that is a replacement receiver
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Posted: 12/18/2011 8:03:32 AM EDT
[#2]
Ok
Someone just built one very close to original then? Guess I'll just shoot the heck out of it. |
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Posted: 12/18/2011 8:20:47 AM EDT
[#3]
Quoted:
Ok Someone just built one very close to original then? Guess I'll just shoot the heck out of it. ^^^^^That's what I'd do. I think it looks great! |
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Posted: 12/18/2011 1:12:33 PM EDT
[#4]
Quoted:
Quoted:
Ok Someone just built one very close to original then? Guess I'll just shoot the heck out of it. ^^^^^That's what I'd do. I think it looks great! Ditto^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
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Posted: 12/18/2011 3:41:14 PM EDT
[#5]
Nice early chrome bore barrel. I agree - build it the way you want.
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Posted: 12/18/2011 6:23:28 PM EDT
[#6]
that's not an early barrel. 733's were marked that way. It's late 80's vintage (R1 forge code FSB gives it away)
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Posted: 12/18/2011 7:44:24 PM EDT
[#7]
Quoted:
that's not an early barrel. 733's were marked that way. It's late 80's vintage (R1 forge code FSB gives it away) Ok so the barrel, and fsb are correct for a 733, glad to know I didn't completly mis read the sticky. Only the upper reciever is incorrect? |
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Posted: 12/18/2011 8:28:18 PM EDT
[#8]
Quoted:
Quoted:
that's not an early barrel. 733's were marked that way. It's late 80's vintage (R1 forge code FSB gives it away) Ok so the barrel, and fsb are correct for a 733, glad to know I didn't completly mis read the sticky. Only the upper reciever is incorrect? and the slip ring, and the crush washer, and the moderator....it's closer to a 629 with a replacement receiver and barrel that needs a delta, and a grenade ring |
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Posted: 12/18/2011 9:19:02 PM EDT
[#9]
I think 733s had a brass bump.
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Posted: 12/19/2011 7:44:57 AM EDT
[#10]
Quoted:
I think 733s had a brass bump. yes, that and the moderator is why I said it's closer to a 629 than a 733 OP if you want to build a 733 from what you have now, you're basically starting with just the barrel and HG's and replacing everything else from the carbine guide: 629 USGI XM177E2, commonly referred to as a “CAR-15” or “Commando” 1967-1970, these carbine are US PROP marked found in the 900,000-909,999 serial number range, and roll marked XM177E2. After US military production ceased in 1970 Colt continued to manufacture an export version of this Carbine as the Model 639: 
733 Commonly referred to as a "Commando", 8 million serial number range 1984-1993?: 
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Posted: 12/19/2011 9:42:11 AM EDT
[#11]
Quoted:
Quoted:
I think 733s had a brass bump. yes, that and the moderator is why I said it's closer to a 629 than a 733 OP if you want to build a 733 from what you have now, you're basically starting with just the barrel and HG's and replacing everything else from the carbine guide: 629 USGI XM177E2, commonly referred to as a “CAR-15” or “Commando” 1967-1970, these carbine are US PROP marked found in the 900,000-909,999 serial number range, and roll marked XM177E2. After US military production ceased in 1970 Colt continued to manufacture an export version of this Carbine as the Model 639: http://img.photobucket.com/albums/0603/Ekie12091941/Govt%20Carbines/variation%20guide/XM177E2147.jpg 733 Commonly referred to as a "Commando", 8 million serial number range 1984-1993?: http://img.photobucket.com/albums/0603/Ekie12091941/Govt%20Carbines/variation%20guide/upperassy12.jpg ^^^ What he said. You got a swell start on an XM177E. I would not worry about the upper being a Martin Marrietta replacement. YMMV |
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Posted: 12/19/2011 10:29:34 AM EDT
[#12]
Here is a factory Colt 733 without the bump.
(from a 1985 Colt Catalog) 
Doesn't matter though, the LM forge code is a USGI replacement (spare parts contract). A CH forge code would be correct for a non-bump 733 as shown in the catalog. |
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Posted: 12/19/2011 5:42:06 PM EDT
[#13]
Thank you guys for all the Help.
I think I am going to get a new more correct moderator, correct FA, and a angled HG ring, and make it more 629 correct. You guys are a great help; can't believe I missed all the cues you guys saw, I even read the sticky before posting. |
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Posted: 12/19/2011 6:05:26 PM EDT
[#14]
look here for the moderator/grenade ring
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Posted: 12/20/2011 10:47:49 AM EDT
[#15]
I've always liked 733's. My replica:
ETA: This is a combination not found in nature. There were 733's with Gen II stocks, and with A2 lowers, but not at the same time. The ones with A2 lowers had fiberlite stocks. 
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Posted: 12/20/2011 5:01:33 PM EDT
[#16]
Dammit VAAR, every time I see that pic I want a 733! I really have to think hard about this 933 upper thing. dammitdammitdammit.
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