Colt LE6920 M4 Carbine - M14 Forum

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Colt LE6920 M4 Carbine

This is a discussion on Colt LE6920 M4 Carbine within the M16 AR15 forums, part of the Rifle Forum category; I purchased the subject rifle recently. I also added a Trijicon ACOG TA31F-G (4x32 green chevron .223 BDC) - rifle shown in picture below along ...


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Old April 23rd, 2017, 04:26 PM   #1
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Colt LE6920 M4 Carbine

I purchased the subject rifle recently. I also added a Trijicon ACOG TA31F-G (4x32 green chevron .223 BDC) - rifle shown in picture below along with some targets from Saturdays range results - still do not know why picture uploads upside down.

I put about 100 rounds through the rifle so far and am really happy with the rifle/scope combination.
The groups in the pictures are at both 100 and 200 yards and utilize Black Hills 69 gr Matchking HP.

I want to try some 69 gr Federal Gold Medal Match loads in it and have some on order.

The question is since this rifle has a chrome lined barrel I would not think it would require any break-in before expecting the best group performance. Is this assumption correct?

Thanks in advance for any comments
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Old April 23rd, 2017, 04:50 PM   #2
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take you picture upside down so it might post right side up
https://tacconusa.com/tac-con-in-action/ match grade rock and roll trigger

6920 is a nice patrol carbine. i went with the 6940

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Old April 23rd, 2017, 05:07 PM   #3
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When I was breaking in my Colt M4 HBAR Like a Match Rifle I was Laughed at.
I guess if it is Chrome lined it is not necessary but mine shoots really good.
Ell (can't say Hell here)I don't know?

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Old April 23rd, 2017, 06:49 PM   #4
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Nice rifle! A friend has an M4A1 rollmarked gun that I was thinking about getting and building a sopmod block 1 clone with! I think I could get it as close to the real thing as possible without the rock and roll switch.

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Old April 23rd, 2017, 07:41 PM   #5
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Quote:
Originally Posted by POLACK View Post
take you picture upside down so it might post right side up
https://tacconusa.com/tac-con-in-action/ match grade rock and roll trigger

6920 is a nice patrol carbine. i went with the 6940
I did take the picture upside down and it did upload right-side up - love technology lol
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Old April 23rd, 2017, 07:57 PM   #6
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The Bushmaster DCM rifle I purchased back in the day came with a break in procedure. As it came from the manufacturer, the bore/rifling had a bit of a frosted appearance to it. You were supposed to perform the break in procedure until the frosted appearance changed to more of a chrome/shiny/glossy appearance.

I've also noticed with other AR-15 chrome-lined barrels that I've owned, that the grouping gets better after a couple of shoot/clean cycles. I have a suspicion it is for the same reason as the Bushy had the prescribed break in procedure.

With the last two AR15 chrome-lined barrels I purchased(1 - 16" gov't profile, 1 - 20" gov't profile), I was disappointed with their initial accuracy/group size (3 inches or so out of the box). After a couple more range visits with cleanings after each, the rifles were shooting much better (1 - 1.5 inches). I'm not sure a prescribed break in is necessary, but I wouldn't be surprised if you see the same type of group improvement after a few shoot/clean cycles like I did.

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Old April 23rd, 2017, 08:01 PM   #7
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3gunnah,in semi mode,it's a match grade trigger,3rd position gives you about 425rpm legally

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Old April 23rd, 2017, 08:39 PM   #8
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That's a nice set up and it wont let you down. I'm running almost the exact same thing, except my ACOG has the red chevron and a killflash anti-reflection device. In regards to accuracy, I'd say yours is doing really good for a military grade rifle.

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Old April 23rd, 2017, 08:49 PM   #9
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That's a nice set up and it wont let you down. I'm running almost the exact same thing, except my ACOG has the red chevron and a killflash anti-reflection device. In regards to accuracy, I'd say yours is doing really good for a military grade rifle.
Thanks
The rifle is a hoot to shoot!!
The ACOG makes it so easy to get on target. I was able to hit very plate I shot at after I got it sighted in.

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Old April 24th, 2017, 05:19 AM   #10
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Picked up mine last year, a 6920 with M4 rollmark & LE prefix, put the Army ACOG TA31RCO on it, along with the (KAC) P&S Gub'ment contract RAS & grip. This is as close as one can get to the real thing without a couple tax stamps for SBR & fun switch.

I've only had it out on 1 outing since buying it new and haven't bothered cleaning it yet, it zeroed easy with IMI-M855 and groups pretty well. One thing I note is an ACOG is an optical gunsight more so than a precision scope, the chevron takes a little getting used to, but, with more practice I'm sure it gets better.


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Old April 24th, 2017, 06:33 AM   #11
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Originally Posted by Gen Jack Ripper View Post
Picked up mine last year, a 6920 with M4 rollmark & LE prefix, put the Army ACOG TA31RCO on it, along with the (KAC) P&S Gub'ment contract RAS & grip. This is as close as one can get to the real thing without a couple tax stamps for SBR & fun switch.

I've only had it out on 1 outing since buying it new and haven't bothered cleaning it yet, it zeroed easy with IMI-M855 and groups pretty well. One thing I note is an ACOG is an optical gunsight more so than a precision scope, the chevron takes a little getting used to, but, with more practice I'm sure it gets better.

Nice looking rifle and sight combo.
I am sure you will get a lot of enjoyment with it.

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Old April 24th, 2017, 06:34 AM   #12
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ACOG=Best medium sight money can buy.

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Old April 24th, 2017, 06:54 AM   #13
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A chrome lined barrel would not normally require any extensive break in, if any, for it to shoot well. Chrome lining is very hard substance and the barrel/rifle shooting better after being used a bit is more likely that the bore is somewhat "fouled" in a very light manner and that usually results in better performance than a absolute clean bore. If going to a match I would not want to start the match with a super clean bore and prefer it to have few shots through it prior to the match. At some long range matches where there is also a short range course, 100-200 etc., shooters who have brought a super clean bore will visit the short range and fire a few shots prior to shooting at the actual match. They are conditioning the bore for the actual match. Just a theory of mine for what it is worth.

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Old April 25th, 2017, 04:28 PM   #14
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Colt

6920s are great work horses. I am on my second one and couldn't be happier.

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Old April 25th, 2017, 08:21 PM   #15
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6920s are great work horses. I am on my second one and couldn't be happier.
I have been happy with the ones I had. I have a colt factory SBR I dressed up like a standard M4 I carried in the National Guard. Mine has the Aimpoint CompM4 red dot.

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