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Posted: 7/27/2005 11:15:05 AM EDT
[Last Edit: 7/27/2005 11:24:43 AM EDT by 5Shot]
I am looking at getting a 6721, but I have noticed that most here who are buying the Colts are opting for a 6920. Since I will never need a grenade launcher, I didn't even consider it. Besides the difference in barrel contour are there any other reasons why I should be looking at a 6920?

I can't find any comment about the 6721 when I do search in this forum, so I don't have any way to make a comparison other than the 2 pages from Colt's catalog.

Just looking for a quick answer if someone has it.

Thanks,

5Shot
Link Posted: 7/27/2005 11:29:05 AM EDT
[Last Edit: 7/27/2005 11:29:30 AM EDT by Couch-Commando]
6920 has a 1/7 twist barrel. 6721 has a 1/9 twist barrel. M-4 is lighter. Thats about it. ETA, both are great guns! Wish I had the money...
Link Posted: 7/27/2005 12:31:21 PM EDT
You won't go wrong with either. I have a 6920 and my friend has a 6721. The only noticable difference is the weight. IMO, the 6721 is a little more nose heavy and it doesn't swing and point quite as fast. But, the heavy barrel of the 6721 has it's advantages as well.
Link Posted: 7/27/2005 1:52:29 PM EDT
The twist the the big difference. 75 grain TAP is the latest, greatest thing and a 1/7 will shoot it better, which is why I got the 6920. Both are good guns.
Link Posted: 7/27/2005 2:51:59 PM EDT
[Last Edit: 7/27/2005 2:53:21 PM EDT by ALAN308]
The 6721 with its 9 twist and hbar is a good handling car. Absense of the M-4 barrel step is a plus in my book. I do not have a grenade launcher. I also do not mind the extra ounces. The 6721 handles great, and if you shoot 55gr. ammo, it will prove to be a good bet for most. Its my favorite of the civillian Colts. Get it. Know that some 6721's I have seen have chrome chambers only. They may all be chrome bore now, I do not know.
Link Posted: 7/27/2005 4:54:15 PM EDT

Originally Posted By ALAN308:
The 6721 with its 9 twist and hbar is a good handling car. Absense of the M-4 barrel step is a plus in my book. I do not have a grenade launcher. I also do not mind the extra ounces. The 6721 handles great, and if you shoot 55gr. ammo, it will prove to be a good bet for most. Its my favorite of the civillian Colts. Get it. Know that some 6721's I have seen have chrome chambers only. They may all be chrome bore now, I do not know.



The one I am looking at is an LE Model, so my guess is that it is fully chrome lined, but I will check.

Thanks for the heads up, and thanks to all for all of the responses, they are much appreciated.

I can get the 6721 without hesitation now.

5Shot
Link Posted: 7/27/2005 5:27:29 PM EDT
I have a 6721 and am confused about the chrome lined barrel issue ... From what I have read here is that Colt has not chrome lined any HBAR's since the late 90's ... Guess a call to Colt will clear it up ... The 6721's barrel is stamped HBAR .. If 6920's have chrome lined barrels perhaps that is the reason for the price difference ...
Link Posted: 7/27/2005 5:53:16 PM EDT


Both carbines a very nice but I had to go with the 6721, those rollmarks sure are sweet.
Link Posted: 7/27/2005 5:53:37 PM EDT
[Last Edit: 7/27/2005 5:56:36 PM EDT by 5Shot]
Well, I thought I read in the specs about the chrome lining, but I can't find anything. I guess I will hold off until I find out.

I wish I could also find a 6721 at a good price that didn't have the LEO Marking on it.

Thanks,

5Shot
Link Posted: 7/27/2005 5:57:43 PM EDT
If you order a colt 6721 barrel only, it will state it is chrome lined, and if you pull the HGs you will see an "o" stamped near the chamber end, which I believe is a milspec requirement for fully chrome lined, mine is faint, but there on a late '04 manufacture 6721.

As to the 75 gr. bullets stablilizing. I will hunt down a box and try some 300yd shots this weekend and post results.
Tuff to find heavy stuff local. lots of 69ers which should be just fine in 1/9 but I may have to order, 75 or 77s

If a heavier round is adopted by the Military, anyone speculate what it would be?
Link Posted: 7/27/2005 6:01:34 PM EDT
[Last Edit: 7/27/2005 6:04:11 PM EDT by COLT6721A3]
I have seen several 6721 roll-marks and they are lighter on the left than the right ... mine is like that. That picture you have is a nice crisp rollmark ...

Here is a picture of one from the Sticky on this site ... notice the left is not as crisp as the right ...

Link Posted: 7/27/2005 6:02:51 PM EDT
The 6721 is chromelined all the way, chamber and barrel.

I shot 77gr at 100yds out of mine, no problemo. The 6721 will shoot significantly better than a 6920 after you dump a mag; the HBAR handles the heat better. You are good to go up to 75gr for sure- 77gr is trial and error.

And if you don't buy a 6721, you can't join the "Cult of the 6721!"
Link Posted: 7/27/2005 6:16:52 PM EDT
AR6721, 1/9 HBAR - 16in CHROME LINED
LE6920 1/7 M4 - 16in CHROME LINED

You cant go wrong with either one... Personally, I like the 6721 lower rollmarks so I built my Tactical carbine using a 6721 lower and SOCOM barrel with the M203 cut out... Its my baby
Link Posted: 7/27/2005 6:38:53 PM EDT
I would take the 6721

I think the car handguards are more comfortable and less bulky, and the barrel is more consistant in strength and rigidity from end to end. Better Balance IMHO too
Link Posted: 7/27/2005 6:42:47 PM EDT
I just noticed the "CAL. 223" markings. Anyone know why it's not labeled 5.56? All their LE rifles are 5.56 chambered.
Link Posted: 7/27/2005 6:51:42 PM EDT

Originally Posted By cmm:
I just noticed the "CAL. 223" markings. Anyone know why it's not labeled 5.56? All their LE rifles are 5.56 chambered.




Well I guess not "all" the LEs are marked 5.56


Link Posted: 7/27/2005 7:01:12 PM EDT
I just noticed the "CAL. 223" markings. Anyone know why it's not labeled 5.56? All their LE rifles are 5.56 chambered.

Well, according to the Colt literature is states that it will handle NATO M855/SS109 and US M193

5Shot
Link Posted: 7/27/2005 7:02:41 PM EDT
[Last Edit: 7/27/2005 7:04:11 PM EDT by cmm]

Originally Posted By 5Shot:
I just noticed the "CAL. 223" markings. Anyone know why it's not labeled 5.56? All their LE rifles are 5.56 chambered.

Well, according to the Colt literature is states that it will handle NATO M855/SS109 and US M193

5Shot



Precisely why I asked the question. I just looked at mine and it is labeled 223 also. Not that I was expecting any different. BTW, I love this rifle. I'm a bit more accurate with it than the 6920HB.
Link Posted: 7/27/2005 7:05:59 PM EDT
Does anyone have a picture of the LE Markings? Just wondering if they are really noticable or not.

Thanks,

5Shot
Link Posted: 7/27/2005 7:14:12 PM EDT
lots of pretty picts. here
Link Posted: 7/27/2005 7:19:41 PM EDT

Originally Posted By COLT6721A3:
I have seen several 6721 roll-marks and they are lighter on the left than the right ... mine is like that. That picture you have is a nice crisp rollmark ...

Here is a picture of one from the Sticky on this site ... notice the left is not as crisp as the right ...

www.chameleonweaponry.com/dr-arf/RM_COLT_223_AR15A3_TACTICAL_CARBINE_DETAIL.jpg




Interesting takedown pin.
Link Posted: 7/27/2005 7:34:37 PM EDT

Originally Posted By cmm:
I just noticed the "CAL. 223" markings. Anyone know why it's not labeled 5.56? All their LE rifles are 5.56 chambered.



Thats a good question... Ive wondered the same myself...

Just a guess, it being a "Tactical Rifle" and all, accuracy is a factor, so it might be because of .223 match grade ammo?
Link Posted: 7/27/2005 7:36:08 PM EDT
Thanks Lucky Punk - the AR6721 roll marks sure are nicer looking than the LE6721 -

Maybe I need to wait and find one that isn't LEO.

5Shot
Link Posted: 7/27/2005 7:37:33 PM EDT

Originally Posted By Variablebinary:
I would take the 6721

I think the car handguards are more comfortable and less bulky, and the barrel is more consistant in strength and rigidity from end to end. Better Balance IMHO too



I like the heavy barrel strength and rigidity also, thats why I went with the SOCOM barrel... To me it seems to also help with faster follow up shots...
Link Posted: 7/27/2005 7:45:05 PM EDT
.
Link Posted: 7/27/2005 7:47:19 PM EDT
[Last Edit: 7/27/2005 7:53:04 PM EDT by luckypunk]

Originally Posted By 5Shot:
Thanks Lucky Punk - the AR6721 roll marks sure are nicer looking than the LE6721 -

Maybe I need to wait and find one that isn't LEO.

5Shot



Actually I just used that pict because it shows the LEO markings on the opposite side of the magwell.

A 6721 (tactical carbine) is like my picture on the gun case, with the same LEO markings opposite. The second gun is a 6921 which is the 14.5" version of the 6920 (law enforcement carbine)


sorry for the confusion, I just ate a quart of yogurt and don't quite feel well.

BTW. .223 on the receiver but it will say 5.56 on the barrel
Link Posted: 7/27/2005 8:05:54 PM EDT

Originally Posted By luckypunk:

A 6721 (tactical carbine) is like my picture on the gun case, with the same LEO markings opposite. The second gun is a 6921 which is the 14.5" version of the 6920 (law enforcement carbine)



Thanks for clearing it up - are their any concerns having the LEO Markings?

5Shot
Link Posted: 7/27/2005 8:11:09 PM EDT
6920

Link Posted: 7/27/2005 8:48:25 PM EDT

Originally Posted By 5Shot:
Thanks for clearing it up - are their any concerns having the LEO Markings?

5Shot




Nope, not aside from being made fun of.
Link Posted: 7/27/2005 9:47:53 PM EDT
Both my 6721 and 6920 are fully chrome-lined.

Colts have 5.56 chambers as noted on the barrel. I can't remember why they mark the receivers "223"-there was a good reason for it but I'm embarrassed to say that I can't remember what it was.
Link Posted: 7/28/2005 5:06:53 AM EDT

Originally Posted By CJan_NH:
Both my 6721 and 6920 are fully chrome-lined.

Colts have 5.56 chambers as noted on the barrel. I can't remember why they mark the receivers "223"-there was a good reason for it but I'm embarrassed to say that I can't remember what it was.



At one time I knew the reason why but I also can't recall and it's bugging me now big time.
Link Posted: 7/28/2005 6:15:02 PM EDT
Thanks for all the responses -

I decided to go ahead and order the 6721.

5Shot
Link Posted: 7/28/2005 6:28:45 PM EDT
Welcome to the darkside
Link Posted: 7/28/2005 6:49:54 PM EDT

Originally Posted By 5Shot:
Thanks for all the responses -

I decided to go ahead and order the 6721.

5Shot



I think you made a good decission, cause you gonna like it...

Let us know what you think of it after you look at it, fondle it, shoot it, fondel it, fondle it some more..................
Link Posted: 7/28/2005 7:04:26 PM EDT

Originally Posted By 5Shot:
Thanks for all the responses -

I decided to go ahead and order the 6721.

5Shot



You are going to love it, mine was a blast.

Link Posted: 7/28/2005 7:44:56 PM EDT
[Last Edit: 7/28/2005 7:46:34 PM EDT by 5Shot]
Stick -

Nice setup - too bad that's not a SIG on your hip hat
I can't wait to get it. I am sending the check out tomorrow, so it will probably be almost 2 weeks before I see anything hinking.gif.

My dad is going to love the fact that I bought a Colt, of course that will all change when I tell him it isn't a First Generation Single Action Army or a Thunderer. The 6721 will be a lot more fun though, since he doesn't shoot any of his.

I am ordering some of the D&H mags too (30 rounders) and next up is a 223 shell plate for my Lock & Load AP.

5Shot
Link Posted: 7/28/2005 8:26:37 PM EDT
The holster is a Safariland 070, commonly known as the SSIII.


If I would have known you were a Sig lover, I would have posted more Glock pics.....
Link Posted: 7/28/2005 8:29:15 PM EDT
[Last Edit: 7/28/2005 8:29:41 PM EDT by SamColt]
I love my 6721 - i ordered it because of a huge back log of 6920 orders at the time....

Want to find a 6520 this week......somewhere......any fans of that model?

i think thats the one - basically a "new model" Colt Light weight sporter?
Link Posted: 7/28/2005 8:47:49 PM EDT
6920 > 6721

lighter
better handling of wider range of ammo
more expesive yes

bottom line...
the 6920 is Colt's top of the line rifle somewhat available to civilians, which is why it is the hardest to get. if money is not an issue, just go with the 6920 and you'll have no regrets.
Link Posted: 7/28/2005 8:49:59 PM EDT

Originally Posted By SamColt:
I love my 6721 - i ordered it because of a huge back log of 6920 orders at the time....

Want to find a 6520 this week......somewhere......any fans of that model?

i think thats the one - basically a "new model" Colt Light weight sporter?


Have you tried Knesek? The last time I looked he had plenty of LEO lightweights in stock

Here's his website: www.knesekguns.com/

Here's his price list: www.knesekguns.com/price.php

One of my shooting buddies owns a 6520, and I was foolish enough to shoot it the last time we were at the range together. I say 'foolish' because after just one mag I fell in love with the damned thing. It's as light as a feather and swings faster than any AR I've ever fired this side of my wife's Carbon 15 "Lady".

Link Posted: 7/29/2005 4:02:57 PM EDT

Originally Posted By CJan_NH:

One of my shooting buddies owns a 6520, and I was foolish enough to shoot it the last time we were at the range together. I say 'foolish' because after just one mag I fell in love with the damned thing. It's as light as a feather and swings faster than any AR I've ever fired this side of my wife's Carbon 15 "Lady".




I had a light weight many years ago and ended up selling it. After seeing and reading more about them recently, I regret it

Its all I think about anymore, so........ Ive begun to gather the parts to build another
Link Posted: 8/4/2005 11:18:03 AM EDT
[Last Edit: 8/4/2005 11:18:49 AM EDT by 5Shot]
Just wanted to post some info that I received from Colt (The LE Sales Department) that answers the question that I (and a few others) had about chrome lined barrels in the LE6721. And yes, I know that some of you already answered that for us!

This is basically a list of "Why You Should Buy Colt" - #2 on the list specifies Chrome Lined Barrels to Mil Std (according to the LE Salesman and #1 on the list the LE6920/6721/6520 are built to the same Mil Spec as the M4 that the Military uses).

I assume that since this came to me on Colt Letterhead that it can be trusted - but I might be wrong!

Dear John,

The following are some components and manufacturing procedures of the AR15/M4 model series which should help validate your decision to consider Colt’s products as part of your tactical weapon system:

1. The AR15/M4 Law Enforcement variants are made to Military standards concurrently with U.S. Government contract weapon.
2. Chrome plated barrel by Mil-Std plater
3. Phosphate coating procedures approved by US Government and monitored by supplier.
4. All parts – including bolts and barrels – are interchangeable
5. Barrel, bolt and bolt carrier steel closely monitored against Colt Standard (tighter that U.S. Mil-Std).
6. Bolt and barrel assembly 100% proof tested and magnetic particle inspected
7. Receiver and front sight forging U.S. Mil-Std.
8. Same anodizing process as U.S. Government weapons.
9. Identical parts subject to U.S. Government witnessed – 6,000 round endurance test and 10 wpn interchange test every month.
10. All materials certified to composition and source
11. In-house materials laboratory to monitor supplies w\compliance to Mil and Colt Specs.


Warm regards,

BC

Law Enforcement Sales Coordinator
Link Posted: 8/4/2005 11:29:34 AM EDT

Originally Posted By 5Shot:
11. In-house materials laboratory to monitor supplies w\compliance to Mil and Colt Specs.



Hey, that "in-house materials laboratory" is precisely where I used to work

And that, sport fans, is why I prefer Colt parts. While they certainly aren't perfect, there is a much greater chance that defective or inferior parts will be identified and eliminated.

QUICK! Someone call Bushy and ask to speak to someone in their in-house materials laboratory...



And while you're on hold, you'd better grab a deck of cards-because you'll be waiting for a looooong time.






Link Posted: 8/4/2005 6:20:49 PM EDT
[Last Edit: 8/4/2005 6:22:11 PM EDT by 5Shot]

Originally Posted By CJan_NH:
Hey, that "in-house materials laboratory" is precisely where I used to work



Did they cull you out due to some Materials Defect?

Just kidding of course - why did you leave?

5Shot
Link Posted: 8/4/2005 7:08:49 PM EDT

Originally Posted By 5Shot:

Originally Posted By CJan_NH:
Hey, that "in-house materials laboratory" is precisely where I used to work



Did they cull you out due to some Materials Defect?

Just kidding of course - why did you leave?

5Shot


Ha!

My wife and I wanted to move back to NH. There was an opening at SigArms in Exeter, so we moved back, bought a house, and have lived happily ever after ever since.

Colt was very, very good to me. My only regret was that I wasn't really a black rifle enthusiast back then-otherwise I would have enjoyed my time there that much more
Link Posted: 8/4/2005 8:25:17 PM EDT
Interesting "Dear John" letter.
Link Posted: 8/5/2005 5:51:52 AM EDT

Originally Posted By Kisara:
Interesting "Dear John" letter.



I can live with that kind! -

I have never had to leave my family for any reason and I am thankful for that. I am also very thankful to those who are out there defending our country and whom have given me the freedoms I enjoy.

Hopefully none of them will get the other kind of "Dear John" letter.

5Shot
Link Posted: 8/5/2005 2:20:44 PM EDT

Originally Posted By 5Shot:
COLT LE6920 VS LE6721 ????





Blonde vs. Brunette


Link Posted: 8/6/2005 6:46:30 AM EDT
Just purchased a 6721 and fired it for the first time yesterday.

It functioned perfectly, and one thing that I was impressed with (was probably just dumb luck) was that I did not have to adjust the sights at all -- they were set up perfectly from the factory. I have a Bushmaster and have had zero problems with it, but I am just more impressed with a general higher feeling of quality on the Colt.

But if the mutant ninja zombie bears attack, either one would probably serve me just fine.I picked the 6721 over the other models simply because I like the HBAR and don't need the m203 step on the bbl. Saved a few bucks that way, and gave up nothing I cared about.
Link Posted: 8/6/2005 7:08:24 AM EDT

Originally Posted By SamColt:
I love my 6721 - i ordered it because of a huge back log of 6920 orders at the time....

Want to find a 6520 this week......somewhere......any fans of that model?

i think thats the one - basically a "new model" Colt Light weight sporter?




Oh, hell yeah!!! Got one a few months ago!!!!! I am a Pencil Barrel Geek and I LOVE IT!!!!!!!!!!!!!

Here's a pic of it attacking a clothes hamper:

Link Posted: 8/6/2005 8:24:06 AM EDT

Originally Posted By desertmoon:

Originally Posted By SamColt:
I love my 6721 - i ordered it because of a huge back log of 6920 orders at the time....

Want to find a 6520 this week......somewhere......any fans of that model?

i think thats the one - basically a "new model" Colt Light weight sporter?




Oh, hell yeah!!! Got one a few months ago!!!!! I am a Pencil Barrel Geek and I LOVE IT!!!!!!!!!!!!!

Here's a pic of it attacking a clothes hamper:

photos.ar15.com/ImageGallery/Attachments/DownloadAttach.asp?iImageUnq=37902



That poor clothes hamper never had a chance.
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