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Called Brownells, Today. Yes I can pin the gas block without voiding the return guarantee.

However, An email response to my question to Kreiger, if they supply a gas block with their DCM/HBAR barrels. is this tidbit!
To Kreiger Barrels;
Comments: I ordered a 1-7.7"" twist HBAR, 20" Chrome Moly barrel for my AR-15 chambered in .223 Wylde. It is supposed to be ready in June 2014. Do you supply a gas block? What aftermarket Gas block would you otherwise recommend. Pinned or clamp on? Thanks! Greg



Response;
Mr. Harman, Our DCM/H-Bar barrels are not supplied with a gas block. Any gas block that will fit a .750" diameter barrel should work properly with this barrel We do not recommend pinning gas blocks/front sights as the taper pins can cause stress risers in the barrel and can contribute to poor accuracy. Either a clamp on or a set screw style gas block are preferred.

Thank You,

Krieger Barrels, Inc.
2024 Mayfield Road
Richfield, WI 53076
Phone: 262-628-8558
Fax: 262-628-8748
www.kriegerbarrels.com

Now this is from the folks that bring you about 25 years or more of making AR-15 Match grade barrels for DCM/NRA competition. While I have no doubt as to the accuracy and reliability of other makers barrels. I also know that Kreiger is a major Accuracy player in this field! Remember, no lead hoses! I am not talking about Combat shooting techniques vs basic Offhand, Kneeling, Sitting and Prone position shooting. I am talking about the absolute capability of the equipment.

GregH
 
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Huh. That might be the big difference right there between a work rifle, and a bench rifle then. A large part may be the cyclic rate of the shooter, per the different metal expansion rates we talked about.
 
Just like anything, you need to check and go over your rifle every few days/rounds. You pull your bolt and inspect the gas rings/firing pin/bolt assist, don't you? Or clean the carbon from the chamber/gas tube/actuator? Check your assembly pins for walk? Optic mounts for tension? Not to be a smarty, just pointing at regular maintenance. So, simply check the tension on the gas block screws. I know of several Army Marksmen teams that have set screws on their gas blocks, and spent several months in the mountains of Afghanistan. Those barrels all came from Krieger, as well. I will mention their set screws were set with blue Loctite. But I have heard no complaints from any of them about barrel life or accuracy problems, only praise for the Krieger barrels. While pinning it would be ideal for the sake of a front sight and end-all durability, there are pros and cons to everything....
 
Sticks,
Not talking about any particular position. Just the absolute capability of the rifle.
DCM matches are not shot from a bench. Unsupported, w/sling, usually 200-600 yards on a National Match Course and reduced distances.. But again, irregardless.
I am interested in accuracy. The addition of "my-own-self" introduces the largest variable. No, I can't stand on my head and shoot! But if I am already down?
Lets just say, for sake of discussion, that under stress and being shot at, "MY" personal capability is 12" at 100 yards. Then add the firearm capability. If the rifle/carbine can only do 5" at 100 yards absolute. Add the two together and you get a 15" cone of dispersion. If That rifle could group 1" or less at 100 yards. The theoretical cone of dispersion is 95% ME! Now increase the distance and your cone of dispersion increases exponentially (200=2X; 300=3X; 400=4X, etc!). if you are at 200 yards with a 15" cone of dispersion that is now 30"! Your hit probability is considerably reduced! We wont talk about 300 yard shots with a "lead hose"!
Now, if you are clearing your home of "bur-gurg-lers"? What ever you are comfortable with! Personally, I would prefer a 12 Gauge
 
Sticks,
Not talking about any particular position. Just the absolute capability of the rifle.
DCM matches are not shot from a bench. Unsupported, w/sling, usually 200-600 yards on a National Match Course and reduced distances.. But again, irregardless.
I am interested in accuracy. The addition of "my-own-self" introduces the largest variable. No, I can't stand on my head and shoot! But if I am already down?
Lets just say, for sake of discussion, that under stress and being shot at, "MY" personal capability is 12" at 100 yards. Then add the firearm capability. If the rifle/carbine can only do 5" at 100 yards absolute. Add the two together and you get a 15" cone of dispersion. If That rifle could group 1" or less at 100 yards. The theoretical cone of dispersion is 95% ME! Now increase the distance and your cone of dispersion increases exponentially (200=2X; 300=3X; 400=4X, etc!). if you are at 200 yards with a 15" cone of dispersion that is now 30"! Your hit probability is considerably reduced! We wont talk about 300 yard shots with a "lead hose"!
Now, if you are clearing your home of "bur-gurg-lers"? What ever you are comfortable with! Personally, I would prefer a 12 Gauge

:-laf Nope!!! not much aimin need be done with a scatter gun ;)

Its Hell on drywall!! :-laf
 
Like one from National Match Armory next door to you out on FM1187? :eek: Oh, yeah, I'm in!! :D Mr. Pierce can make 'em shoot like no other I've ever met. Shot with him out at Fort Wolters across the course several years ago... Anyone got any of his rifles?
 
Boutin can make 'em shoot, too. He'd had surgery a little over a year ago, I'd hear, and was down and out for several months. I've never owned anything he's worked on, but shot some, and they shoot well. A friend knew him, as a gunsmith, and said he learned a lot about rifle and pistol assembly from him. I can't say I've ever met the man, but his reputation preceeds him.
 
Certainly none meant..... I guess it's a viable option. They're great barrels for the weekender.... But I've had several, and while some would shoot, they never last very long. In magnum chambers, I've had several that just plain quit after 1-1500 rounds.... Almost half of what a better barrel will do. I even have a recent select match barrel that was cut backwards... they contoured it the opposite direction from the way they rifled it... It shoots pretty decent the first 15 rounds, but after that it goes stupid... and you can't shoot certain bullets in it. It strips the jackets off of Berger bullets, and fouls like David Beckham... I just had a bad experience with them... They're fairly close to me, too... The old man used to make a top-notch barrel. One of my first 270s had one of his barrels, I bought it used, and put 2k+ rounds through it before it started going away. But it got fast as it got older.... It'd push 150gr Sierra's over 3kfps!!

Anyway, I've actually used several of their barrels in .204 and .223 Wylde for the AR platforms.... Really affordable way to build a new upper. Two have already started to go away. We've recrowned 'em, tweaked the loads, and changed bullets, but not had any improvements.... They just don't take very many rounds. They sell three grades in the AR barrels; the chromoly, match SS, and select match SS.... With a wholesale account, and in volume, the SS barrels can be purchased for around $330 ea. Threaded, short-chambered, Remington barrels can be bought for $350.......

As an interesting note, I just go this in my email a bit ago.... DPMS 1:9 barrel, on flat top receiver... not a bad price..... http://www.brownells.com/aspx/general/daily_deals.aspx
 
Couple of things, today!
I will stay with Kreiger or Noveske (http://www.tieronearms.com/product-p/recbarrel.htm), for that price! Even FN barrels marketed by various AR suppliers would be preferable to Shilen. Even Douglas barrels are superior, IMHO.
Shilen barrels have had some winners, in the past. But not to many folks that I know use them in any shape or form!
Trying out the Criterion 16" barrel for the carbine upper. I am hoping this is a "sleeper"! If not? I will send it back to Brownells!

Now we can move farther on our goals, with the AR build.
Just received the final check from RUGER. WE are now fair and square!

Waiting on the gas blocks and still undecided on the flash suppressor/hider. The Micor twist matched flash hider is really interesting.
In my research, comparing brakes and flash hiders, there is one common thread. Even/ equal radial venting for accuracy. Lying prone, in the dirt, you will surely kick up the dust!
However, "standing on your head", Carbine horizontal, or firing from prone upside down, will create the same signature scenario with an unvented bottom Flash hider

Still pondering he universal truths of "becoming one with the "lil black rifle":-laf!
Decisions+$, decisions+$, decisions+$! Just may thread a protector nut onto the muzzle threads for the time being!

GregH
 
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The most common issue with the muzzle breaks/compensators is that your shooting buddies don't like to be within 10 feet of you if shooting side by side. The standard "howitzer" design that force the majority of the gasses to the sides, and a little out the top really does not kick up that much dirt when prone, unless you are rolled over 20* or more. A little more than a standard A2, less than a flash hider that has ports on the bottom. Has not been an issue for me.

The flash signature is what is bad if low light, and you are worried about giving away your position.
 
If it gets that critical about dust signature and sound suppression, there are other options.... which work very well for hunting purposes, I might add. And you don't even have to wear ear protection while shooting.....

But a muzzle protector can be done cheap and still have a nice appearance.... :D
 
Ran into this today, interesting.

Newt

Soldiers are complaining that the weapons they’ve been issued may be fatally flawed.

“The reliability is not there,” Army Senior Warrant Officer Russton B. Kramer, told the Washington Times of the Army’s primary rifle – the M4 carbine. “I would prefer to use something else. If I could grab something else, I would.”
Capt. James Nardelli, part of a deploying Security Force Assistance Team with the 2nd Battalion, 502nd Infantry Regiment, 2nd Brigade Combat Team, 101st Airborne Division (Air Assault), fires at a target during a stress shoot training exercise at Fort Campbell's Range 40a, Feb. 16. The stress shoot training exercise conditions soldiers to effectively hit their targets in highly intense situations

Capt. James Nardelli, part of a deploying Security Force Assistance Team fires an M4 at a target during a stress shoot training exercise at Fort Campbell’s Range. Years of testing have shown the M4 to be less than reliable, especially in dusty, sandy areas. (U.S. Army)

Kramer, a 20-year Green Beret, believes if a solider wants to improve their chances of survival, the best bet is to make modifications to the Army’s standard-issue model. Operators and policy makers have debated the M4′s value for years, and documents obtained by the Washington Times show the Pentagon was warned before the Afghanistan and Iraq wars that several M4 carbine iterations were flawed and might jam or fail, especially in the harsh desert conditions that both wars inflicted.

U.S. Special Operations Command in 2001 issued a damning private report that said the M4A1 was fundamentally flawed because the gun failed when called on to unleash rapid firing. And In 2002, an internal Army report from the Picatinny Arsenal in New Jersey said the M4A1 was prone to overheating and “catastrophic barrel failure.”

Defense Industry Daily highlighted briefing documents obtained by the Army Times reporting on several M4 failures:

“USMC officials said the M4 malfunctioned three times more often than the M16A4 during an assessment conducted in late summer 2002 for Marine Corps Systems Command at Quantico, VA.

Malfunctions were broken down into several categories, including “magazine,” “failure to chamber,” “failure to fire,” “failure to extract” and “worn or broken part,” according to the briefing documents. During the comparison, the M4 failed 186 times across those categories over the course of 69,000 rounds fired. The M16A4 failed 61 times during the testing.

The Army conducted a more recent reliability test between October 2005 and April 2006, which included 10 new M16s and 10 new M4s… On average, the new M16s and M4s fired approximately 5,000 rounds between stoppages, according to an Army official who asked that his name not be released.”

efw

USMC officials said the M4 malfunctioned three times more often than the M16A4 during an assessment conducted in 2002 for Marine Corps Systems Command (Shutterstock).

Last summer, the Army terminated the Individual Carbine competition announcing the Army would not proceed with selecting a follow-on weapon for the M4/M4A1. Eight competitors failed to impress the DoD with their solutions to the current weapon’s problems; Adcor Defense, Beretta, Colt, Fabrique Nationale, Heckler & Koch, Lewis Machine & Tool, Remington and Troy, according to Defense Media Network.

During the Pentagon briefing June 14, 2013, Brig. Gen. Paul A. Ostrowski, U.S. Army Program Executive Officer – Soldier (PEO Soldier), said surveys from soldiers returning from combat have shown that soldiers are happy with the current weapon:

“We do extensive post-combat surveys after every unit redeploys from theater. Over the past four years, the survey results have revealed that in compilation, over 80 percent of soldiers are completely satisfied with the M4 coming out of theater. And that trend is moving upward. Over the last two years, it’s actually been 86 percent soldier acceptability for the M4. It’s battle proven. It’s lethal. It’s accurate.”

But the Army’s M4 carbine Product Improvement Program is still in full swing. The initial announcement of the program in 2011 said: “The objectives of the overall M4 Carbine PIP are to enhance the weapon’s durability, reliability, maintainability, accessory integration, sustained rate of fire, and ergonomics without negatively affecting the current performance of the M4/M4A1 Carbine.”
few

The Washington Times reported on improvements to the controversial rifle in the last 20 years (Image via Washington Times).

The Army has executed 92 improvements to the M4/M4A1 since 1990, and continues to see a range of platform enhancements, according to Defense Media Network. But slow processes may have hampered crucial design progress during the U.S. Army’s longest war.

In the mean time, soldiers like Warrant Officer Kramer said he and fellow Special Forces soldiers break the rules and convert their M4′s into the “commando version”: They buy off-the-shelf triggers and other components and overhaul the weapon themselves.

Retired Army Maj. Gen. Robert Scales, an artillery officer who earned the Silver Star in Vietnam, is a prominent M4 critic. He told the Washington Times the 5.56-caliber bullet is too small and the gas-piston firing system is prone to stoppage. He said better weapons — the German Heckler-Koch G36 and Russian AK-74 (a version of the venerable AK-47) — use superior firing systems.

“Frankly, this whole thing is scandalous,” Gen. Scales said. “We send soldiers into close combat with lousy weapons and we’ve done it since World War II and nobody complains. It’s a national outrage.”



Updated Feb 22: Maj. Gen. Scales’ quote to the Washington Times refers to a gas-piston firing system for the M4, however the older M4 models use a design called direct gas impingement.
 
Saw that article, this week!
If they think the new generation AR's have issues? They should have done a tour with the M-16A1's,
with 1968 issue ammo!!!
But, always seeking improvement is necessary.
GregH
 
yeah I've seen that article as well. Nothing new there. I think there was a debunking of it as well - the test was found to be biased against the M4 platform.

Lets look at their focal points

Malfunctions were broken down into several categories, including “magazine,” ...Not the rifle“failure to chamber,” ...Typically Magazine or ammo related - not the rifle “failure to fire,”Ammo related - “failure to extract” Ammo related and “worn or broken part,” - yeah, well parts wear out. according to the briefing documents. During the comparison, the M4 failed 186 times across those categories over the course of 69,000 rounds fired. The M16A4 failed 61 times during the testing.

Granted there will be a few times when a FTFire, FTFeed/Chamber, and FTExract/Eject will be rifle related, and those are worn parts, lack of maintenance, and yes, like everything else, the fire control group got a handful of dirt or sand in it. Nowhere near the rate that they claim that can be pointed all to the rifle.

189 failures - 69k rounds. That is one hiccup every 10.6 mags, a rate that I have not seen in either of my rifles, nor any of the 60 odd rifles that I saw at my 3 training classes...20 guys, 1300 rounds a piece over 2 days,
 
Well, the biggest problem there, arguably, is the failure to recognize worn or defective parts. (Personally, I think a lot of mil parts are pretty junky....) Those guys are taught to field strip it in a cited period of time, but nowhere do they teach them to look for worn/cracked ejectors, worn bolt lugs, broken ejector springs, or leaking gas blocks...... And if quality control doesn't see bad parts before they leave, how are the GI's to know any different? Armorer's are overworked most of the time, anyway, usually do to poor care or poor maintainance, if any, and they miss things. Add inexperience and poor parts to the mix, and you've got a high failure rate. I'd wager failure rates in the field are directly related to experience and personal work ethic of the individuals using or working on them.....
 
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