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10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/17/2005 8:03:56 PM EDT
[Last Edit: 8/17/2005 8:49:04 PM EDT by repub18]
besides CMT and Colt? Stripped, not a barreled upper.

and yes I know Colt doesnt offer them, I just dont feel like paying over $200 for a $100 part.
Link Posted: 8/17/2005 8:05:54 PM EDT
LMT
Link Posted: 8/17/2005 8:08:04 PM EDT

Originally Posted By Va_Dinger:
LMT




as stripped uppers? I wouldnt want the logo though.
Link Posted: 8/17/2005 8:13:05 PM EDT
CMMG.
Link Posted: 8/17/2005 8:13:44 PM EDT

Originally Posted By model927:
CMMG.




Real M4 cuts not dremeled
Link Posted: 8/17/2005 8:27:34 PM EDT
This sounds weird, but my Armalite flattop upper came with ramps.
Link Posted: 8/17/2005 8:40:29 PM EDT
CMMG dremel cuts theirs?
Link Posted: 8/17/2005 8:42:26 PM EDT
[Last Edit: 8/17/2005 8:57:58 PM EDT by Va_Dinger]

Originally Posted By repub18:

Originally Posted By Va_Dinger:
LMT




as stripped uppers? I wouldnt want the logo though.



Edit- I just noticed "Stripped".

No, I do not know anybody who has stripped LMT uppers for sale.
Link Posted: 8/17/2005 8:45:30 PM EDT
My RRA NM upper came with them.
Link Posted: 8/17/2005 8:47:43 PM EDT
My RRA Entry Tac. has buttery smooth feed ramps
Link Posted: 8/17/2005 9:00:24 PM EDT
Technically, real M4 feed ramps must be a feature on a military issue Colt made M4A1 carbine.

And I dont buy into that 6920 "close as can be" bullshit

It's either an M4 or it isnt and no one can own an M4 unless they enlist
Link Posted: 8/17/2005 9:22:21 PM EDT

Originally Posted By Variablebinary:
Technically, real M4 feed ramps must be a feature on a military issue Colt made M4A1 carbine.

And I dont buy into that 6920 "close as can be" bullshit

It's either an M4 or it isnt and no one can own an M4 unless they enlist



Not sure if this accurate. I have several Colts with the with M4 ramps, including a post ban Match Target II, and 6400C. They look exactly like the feed ramps on the 6920.

By the way, the 6400C is marked "M4 Carbine" on the lower, so is it an M4 or isn't it?
Link Posted: 8/17/2005 9:54:57 PM EDT
[Last Edit: 8/17/2005 9:58:38 PM EDT by Sigurd]

Originally Posted By Variablebinary:
Technically, real M4 feed ramps must be a feature on a military issue Colt made M4A1 carbine.

And I dont buy into that 6920 "close as can be" bullshit

It's either an M4 or it isnt and no one can own an M4 unless they enlist








Do you really believe what you're saying?

That's like saying that you don't have a "real" bolt catch roll pin, because it's not a real bolt catch roll pin unless it's on a govt issued rifle.

Get a life and quit trolling any thread that mentions Colt.
Link Posted: 8/17/2005 10:10:47 PM EDT

Originally Posted By Sigurd:

Originally Posted By Variablebinary:
Technically, real M4 feed ramps must be a feature on a military issue Colt made M4A1 carbine.

And I dont buy into that 6920 "close as can be" bullshit

It's either an M4 or it isnt and no one can own an M4 unless they enlist








Do you really believe what you're saying?

That's like saying that you don't have a "real" bolt catch roll pin, because it's not a real bolt catch roll pin unless it's on a govt issued rifle.

Get a life and quit trolling any thread that mentions Colt.



I've never heard of an M4 Bolt Catch Pin. Have you? So then there is no distinction is there. But I bet you thought you were being clever there.

Link Posted: 8/17/2005 10:29:00 PM EDT
[Last Edit: 8/17/2005 10:34:35 PM EDT by Hired_Gun]
Since the the person who started the thread said "Real M4 Feed Ramps" that by default means Colt because only Colt makes the M4. If you dont buy Colt your feed ramps arent real M4 ramps, just a clone. This isnt an issue of techincal specifications, but a company trademark

However...what determines if something is "real" or not? I personally determine how "real" my weapons are by how they function.
Link Posted: 8/18/2005 2:48:06 AM EDT

Originally Posted By Hired_Gun:
Since the the person who started the thread said "Real M4 Feed Ramps" that by default means Colt because only Colt makes the M4. If you dont buy Colt your feed ramps arent real M4 ramps, just a clone. This isnt an issue of techincal specifications, but a company trademark




Actually LMT and CMT have the real deal M4 feed ramps also, they are not simply dremel cuts.
Link Posted: 8/18/2005 8:55:21 AM EDT
This forum is turning to shit. All I asked was a simple fucking question.
Link Posted: 8/18/2005 8:57:51 AM EDT
[Last Edit: 8/18/2005 8:58:47 AM EDT by repub18]

Originally Posted By Variablebinary:
Technically, real M4 feed ramps must be a feature on a military issue Colt made M4A1 carbine.

And I dont buy into that 6920 "close as can be" bullshit

It's either an M4 or it isnt and no one can own an M4 unless they enlist




-1


Link Posted: 8/18/2005 9:08:37 AM EDT
Guess you cant get a real GI haircut unless you enlist either...

If CMT does indeed make Colt's uppers...and makes the same M-4™ type feed ramp cuts...
Then CMT probably uses the same cutting tools and programs to cut both CMT and Colt's ramps

In which case the only difference would be the Colt™ logo?
Link Posted: 8/18/2005 10:10:58 AM EDT

Originally Posted By repub18:
This forum is turning to shit. All I asked was a simple fucking question.



Actually, this forum turned to shit a long time ago
Link Posted: 8/18/2005 10:49:00 AM EDT
No argument from me, but its a well known fact that all the cool people hang out in the build section. We have less ignorance and more actual weapon interest...... but keep that our secret.
Link Posted: 8/18/2005 11:05:02 AM EDT
If I recall
M4 Barrel + M4 Upper: OK
Non M4 Barrel + M4 Upper: Not OK
M4 Barrel + Non M4 Upper: OK
Right?
Link Posted: 8/18/2005 11:13:23 AM EDT

Originally Posted By WSAR15:
If I recall
M4 Barrel + M4 Upper: OK
Non M4 Barrel + M4 Upper: Not OK
M4 Barrel + Non M4 Upper: OK
Right?



Funtion-wise, yes.

BTW, repub18, CMT makes some high quality stuff and I'm VERY pleased with mine (M4 cut).

It matches up to my Sabre barrel perfectly.

WIZZO
Link Posted: 8/18/2005 11:37:54 AM EDT

Originally Posted By M4arc:

Originally Posted By repub18:
This forum is turning to shit. All I asked was a simple fucking question.



Actually, this forum turned to shit a long time ago



+1
Link Posted: 8/18/2005 11:51:05 AM EDT
You should have started off with putting a caveat into your statement "If you don't know the difference between REAL M4 ramps and M4 ramp like cuts (www.ar15.com/forums/topic.html?b=3&f=118&t=191733), don't bother to answer".
Link Posted: 8/18/2005 12:20:41 PM EDT

Originally Posted By Stickman:
No argument from me, but its a well known fact that all the cool people hang out in the build section. We have less ignorance and more actual weapon interest...... but keep that our secret.



Dude! What the hell did you let the cat out of the bag for???
Link Posted: 8/18/2005 12:27:14 PM EDT
Link Posted: 8/18/2005 12:52:37 PM EDT
My Colt AR6721 Tactical Carbine has them as well, including the M4 barrel extension and "F" marked FSB (before I chopped it for a FF forend). My LE6920 and both of my MT6400Cs have them as well of course. An MT6400C is marked "M4 Carbine"-is that not considered a Title I M4? Colt says it is, after all.

Perhaps someone should contact Colt to tell them they're wrong
Link Posted: 8/18/2005 1:13:08 PM EDT
AFAIK, here's the list:

Colt, LMT, CMT and Aramalite. A little known fact - all new production Armalite upper receivers have correct extended ramps - that's ALL of them AR-15 A2 and A4 and AR-10.

RRA doesn't offer correct M4 cuts, they Dremel them in.

There may be more people, like vendors selling uppers with anodized M4 ramps in them, for example I got a few from Del-Ton a while back, but I don't have any idea who they got it from.
Link Posted: 8/18/2005 1:18:04 PM EDT

Originally Posted By mongo001:
<snip>
There may be more people, like vendors selling uppers with anodized M4 ramps in them, for example I got a few from Del-Ton a while back, but I don't have any idea who they got it from.



That just reminds me, I have an A2 upper from M&A parts that had M4cuts in it (the correct cuts too)

Here's a pic. (It's a bad pic, but I have since dremeled the barrel extension to match the ramps due to horrible FTFeed problems from the rifle barrel extension)



WIZZO
Link Posted: 8/18/2005 1:25:11 PM EDT
Link Posted: 8/18/2005 1:27:55 PM EDT
I didn't think anything of it at the time, but I should have just swapped the upper and kept this one.

I'm not sure what kind of uppers M&A is running out the door nowadays.

WIZZO
Link Posted: 8/18/2005 10:50:59 PM EDT

Originally Posted By Variablebinary:
Technically, real M4 feed ramps must be a feature on a military issue Colt made M4A1 carbine.

And I dont buy into that 6920 "close as can be" bullshit

It's either an M4 or it isnt and no one can own an M4 unless they enlist



Since everyone else is picking apart this post let's not forget to mention that service members do not own the equipment, the government does.

Link Posted: 8/19/2005 12:41:30 AM EDT
So what's the real difference (not manufacturing difference) between the cuts CMMG puts in their upper receivers and the feed cuts put into Colt's uppers?

Do they look different? Do they not meet up with the barrel extensions properly? Do they not aid in the feeding of cartridges fromt the magazine into the chamber? Would I be better served to NOT have these cuts in my upper, and just have normal (un-cut) uppers like my three other ones?
Link Posted: 8/19/2005 2:40:38 AM EDT

Originally Posted By BravoCompanyUSA:

Originally Posted By WIZZO_ARAKM14:

Originally Posted By mongo001:
<snip>
There may be more people, like vendors selling uppers with anodized M4 ramps in them, for example I got a few from Del-Ton a while back, but I don't have any idea who they got it from.



That just reminds me, I have an A2 upper from M&A parts that had M4cuts in it (the correct cuts too)

Here's a pic. (It's a bad pic, but I have since dremeled the barrel extension to match the ramps due to horrible FTFeed problems from the rifle barrel extension)

img.photobucket.com/albums/v702/WIZZO_ARAKM14/DCP_0529a.jpg

WIZZO




Haven't seen many A2 uppers with the extended feed ramps cuts . . . pretty cool.



Colt 6520, if I have the number correctly.
Link Posted: 8/19/2005 3:16:39 AM EDT
WIZZO-
What speed setting/ bit did you use to bring the extension down? I've got a DPMS M4-profile I'm going to try to put in an Armalite upper, and it'll give me the same problem you demonstrated.

Link Posted: 8/19/2005 3:46:25 AM EDT
Link Posted: 8/19/2005 3:07:40 PM EDT
[Last Edit: 8/19/2005 3:08:49 PM EDT by WIZZO_ARAKM14]

Originally Posted By pisgahrifle:
WIZZO-
What speed setting/ bit did you use to bring the extension down? I've got a DPMS M4-profile I'm going to try to put in an Armalite upper, and it'll give me the same problem you demonstrated.




It is a Dremel metal bit. I think it was about $8 at Wal*Mart. The diagram I have of Dremel bits says it might be bit # 9901.

I just cranked it up to 3/4 speed and had at it. The steel of the barrel extension was actually pretty soft and it didn't take too long to match the ramps.

WIZZO
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