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USGI Colt Carbine parts variation guide Edition IV (Page 2 of 3)
Wow, great stuff, will get it in the guide, but will be awhile..... |
Any clue as to why the USAF didn't receive coated stocks? Some argument about it not being necessary because they were going to largely be for perimeter defense? Or was this just because they were so early in the Colt production cycle that Colt hadn't decided to coat the stock yet? |
Air Force carbines get the same buttstocks Army carbines get, which one it is depends on date of manufacture. |
Alright, thanks, good to know. |
Not sure on the years, notice the question mark. Never seen any evidence that they were used in Vietnam. Don't know of any source of information on the 653. |
Thank You |
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When was the 4-position collapsible stock introduced? I want to build a 723 clone (w/ C7 upper and 1/7 lightweight barrel), and I'm curious if these might have had a 4-pos stock on later models. Also, was there a point where 4-pos tubes and type-3 stocks would have used the locking nut with the 3 dimples, and not the current type of castle nut? I understand that there were always exceptions and mixed parts examples with Colt, but I'm curious if the above examples existed in any real numbers. |
It's not listed because it is not USGI. It is commercial. |
"I've yet to master my inner idiot." - jkstexas2001
"The road to hell it seems is paved with retro lowers." - WA-Tom
"The road to hell it seems is paved with retro lowers." - WA-Tom
| where can I get a set of those carbine length triangle forends and the tri caps on each end we had some of these in Nam and I like to build my retro with them. I think I say so in shotgun news but didn't see any end caps and now can't find the SN it was in. HELP |
Little bit of my anal tendancies comming out...
Early USGI side-sling-swivels used pre-2000 have "M16A1" and "M16A2" written on thier perspective sides of the mounting block. The current ones produced by the likes of Bushmaster lack these stamps. 
This was a take off from a thrashed Hydramatic A1/A2 rebuild for those that would like to know... -RH |
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Originally Posted By RLR350:
I put together some slides showing some details of things I have learned from you guys about comparing Colt handguards to others. Thought it might be useful to someone, so here it is. Please correct me if anything is wrong and I will change it. Some other brands will have some of the same features as Colts, but usually not all of the same features. These examples are Colt, RRA (which are close replicas) and an unknown brand. Captions are below the picture. 
Green - Colt's will have six holes. Red - Colt holes are tapered. RRA's are tapered also. The unknown brand is vertical. Purple - The Colt lines are thin and clear. RRA's are thin, not as clear cut and the unknown brand has clear, but less lines. The Colt's tend to be shiny and the others are a more flat finish. The unknowns also have knubs on the front where they go into the end cap. 
Red - Colt vertical ribs go into the horizontal ribs at 45 degrees. The other two brands are at 90 degrees. Blue Arrow - The top ridges roll over the end on Colts. Although you can't see the other brands, the unknown brand stops without rolling over. 
Red - A better view of the top ribs rolling over the edge. Not so on the unknown brand. 
Red - The heat shields on the Colt's and RRA's have tabs. The unknown brand is bent the entire length. Some brands have tabs, but they are square instead of one end of the tab being curved. Blue Arrow - The Colt's and RRA's have tongues and grooves along the edge. The unknown brand is smooth. 
Inside, rear close up: Red - The Colt's have a thin "L" shape. RRA's have a thicker "U" shape. The unknowns are covered by the heat shield. Purple - The top of this ridge is flat on Colt's. Round on the RRA's and thinner on the unknowns. Blue Arrow - This wall is angled on the Colt's. It is vertical on the RRA's. 
Inside, front close up: Red - The Colt's have a smooth "C" shaped curve. The RRA's are more of an "S". The unknowns are flat, no ridge. 
Green Arrow - Better view of the front ridges. Blue Arrow - Both the Colt's and RRA's have internal ribs, although slightly different. The unknowns don't have them. Red - The Colt's may have a backwards "1" or "2". The RRA's have "Israel" markings. The unknowns only have a normal number, "4" in this case. |
Run with scissors!!!!
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More info on the handguards in this thread started by RLR350.
Clickety Clickety |
Run with scissors!!!!
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I have a stack of pics of some "G" marked, Green Mountain produced M4 barrels that I just pulled off if someone wants to host them. Also, is there a place to put pics of some commercial / export Colt guns?
ETA... So I forgot I had taken these on my last go in Baghdad so I figured I'd post them up. Most of what I took got corrupted on an old external but I was able to salvage these. This is a Green Mountain produced Colt barrel I pulled off of a issued M4A1. 
Here is a M4A1 configured gun that wandered in as well. I had a full set of pics but this is all thats left from the same drive. 
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"Here's to gunpowder and pussy; live by one, die by the other, love the smell of both."
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Originally Posted By Gunslinger-Mike:
Any information about T-marks on the flat-top uppers? Is it true that early M4/M4A1 carbine from Colt came without T-marks? I got conflicting info on this. Thank you! True. I have one that is M4/16inch/1-in9 twist without "T" markings on the upper rail. Front of receiver has just the letter "M" stamped above the gas tube port. |
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Originally Posted By xcibes:
I am confused now. I have a barrel that I think is from a Colt 653 and is marked C MP CHROME BORE but it is dated 1/96. I understand that some 723 barrels had these same markings buthad a 1/7 twist. Any idea how to identify my barrel? Is it one of the bubbaguns barrels? IIRC, those are replacement 653 barrels and have the later "A2" profile under the handguards. Dustin |
| Brought back old memories of the 649's and 653's, Commando's and CAR-15's we had at Nellis AFB in the late 1970's and early 1980's, my tenure there. I think we had some of the commando's, the muzzle break looks familiar. But itt has been over 30 years. |
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Pardon the dumb question if everyone else already knows this, but can someone tell me what the muzzle device on the XM177E2 'Commando' actually is?
Reading different places I see it called a flash hider, muzzle brake, compensator, even a suppressor. Is there anything inside it like baffles or something? I figure the reason for building the carbine was to have a short, lightweight rifle, so I'm guessing they had a reason for adding that long thing to the end of the barrel. Thanks. |
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Thanks a lot for the pics. To my untrained eye that looks like a suppressor (never owned one myself).
So are all the extended muzzle devices on the different models similar? eta: I know how popular suppressors are these days with Spec Ops types, I didn't realize they were used back in the Vietnam era. Compared to the suppressors in use now those seem quite a bit smaller. |
USGI Colt Carbine parts variation guide Edition IV (Page 2 of 3)
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