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Quoted:
OP doesn't know how to read reports? MRBF = Mean Rounds Between Failures. Higher numbers are better. The HK entrant (09D) got 2nd place in Class I and II and 3rd in class III and had the best barrel life. Based on these results, the HK makes the most sense as you are more likely to change out a barrel then have a Class III failure. Plus with a relatively high class I and II failure over the colt options its clearly better for the guys in the field. Altough I would have picked the FN. Not a single class III failure in all of testing? That's rather impressive. Still better barrel life than the colts and 5000 MRBF for class I and II, 4 times that of all the other entrants? Seems like a clear winner on this data. View Quote And MARSCORSYSCOM wouldn't tell me how either. Fact is HK was slightly more reliable than the Colt 13 stoppages vs 20, however it broke way more often, 20k vs 60k. Look, there is no way you can tell me with a straight face Colt barrels only last 1,600 rounds. You just can't. |
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OP doesn't know how to read reports? MRBF = Mean Rounds Between Failures. Higher numbers are better. The HK entrant (09D) got 2nd place in Class I and II and 3rd in class III and had the best barrel life. Based on these results, the HK makes the most sense as you are more likely to change out a barrel then have a Class III failure. Plus with a relatively high class I and II failure over the colt options its clearly better for the guys in the field. Altough I would have picked the FN. Not a single class III failure in all of testing? That's rather impressive. Still better barrel life than the colts and 5000 MRBF for class I and II, 4 times that of all the other entrants? Seems like a clear winner on this data. View Quote The calculated barrel lives are preposterous, I simply can't see any way there's that much disparity. |
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A, B, C and D all passed the reliability tests, but FN scored above the rest
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Yes. The M27 was adopted in 2009. These are the test results. A further breakdown between Colt entrant A and HK entrant D. Colt - 20 stoppages per 20,000 rounds. H&K - 13 stoppages per 20,000 rounds. View Quote |
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We don't know how they came to that est. Barrel life. And MARSCORSYSCOM wouldn't tell me how either. Fact is HK was slightly more reliable than the Colt 13 stoppages vs 20, however it broke way more often, 20k vs 60k. Look, there is no way you can tell me with a straight face Colt barrels only last 1,600 rounds. You just can't. View Quote |
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But look at the difference in estimated barrel life between the two! Holy cow! View Quote View All Quotes View All Quotes Quoted:
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Yes. The M27 was adopted in 2009. These are the test results. A further breakdown between Colt entrant A and HK entrant D. Colt - 20 stoppages per 20,000 rounds. H&K - 13 stoppages per 20,000 rounds. Were the barrels made out of copper? Colt M4 barrels last substantially longer than the estimates presented here. |
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But look at the difference in estimated barrel life between the two! Holy cow! View Quote According to the data they tested the barrels at 5,000 rounds. So at that point they would either be good, or not. If they don't test till 5,000 rounds how can they know the Colt barrels were gone at 1,800? Although I'm sure MARSCORSYSCOM purposely chose estimated barrel life to release for a reason. Probably because it's the only factor to truly favor the M27 selection according to these results. Colt was 3x as durable, and only a fraction less reliable (13 vs 20 stoppages) while also running $1,600 less per rifle. So they chose the H&K based off of estimated barrel life? Seems fishy. Edit: and you can't tell me FNH barrels only get 5,000 rounds....Especially a heavy barrel SCAR variant. |
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The 10th IAR Bid Sample, Competitor I, was determined
unsafe for live fire due to a lack of proof marking. Live fire testing was not conducted. View Quote |
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Is the FN not just a SCAR essentially? They have lots of problems besides reliability of the action itself. The calculated barrel lives are preposterous, I simply can't see any way there's that much disparity. View Quote Basically, if you get it hot enough, it switches from closed bolt to firing from an open bolt. Makes it great for sustained fire, IE, the role of an automatic rifle. I'm suspecting shenanigans if they claim HK has 20K barrel life but the Colt, with it's heat sink and heavy barrel made of the same material as standard M4 barrels, is getting under 2K. Not to mention FN's CHF barrels, the Scar is well-regarded in terms of barrel life. Having everyone but HK use M855A1 is the only way I can see them burning out barrels that quickly. I want to see the standards for a barrel to have been considered "shot out." |
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Anybody can use an old A2 grip. H&K has a different grip. That's probably why they won.
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If I remember correctly, LWRC submitted a rifle based on one of their piston setups. Closed bolt in semi, open bolt in full. Don't know what letter they were assigned though.
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Saw this image online.
I wonder if the 6940H was the other Colt submission: http://i50.tinypic.com/2ighgdg.jpg |
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Only way I see the HK making 20K rounds while everything else is under 10K is if the HK was running M855 and everything else was running M855A1... And everyone was doing full-auto. View Quote View All Quotes View All Quotes Quoted:
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We don't know how they came to that est. Barrel life. And MARSCORSYSCOM wouldn't tell me how either. Fact is HK was slightly more reliable than the Colt 13 stoppages vs 20, however it broke way more often, 20k vs 60k. Look, there is no way you can tell me with a straight face Colt barrels only last 1,600 rounds. You just can't. |
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... regardless, at this point in my lifetime, I'm staying with Colt
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... regardless, at this point in my lifetime, I'm staying with Colt View Quote The Colt IAR did well. 3 UUTs each firing 20,000 rounds. 61 stoppages out of a combined 60,000 rounds. 1 parts breaking out of a combined 60,000 rounds. That's not insignificant. |
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How many machines exist that are capable of building a barrel like that? View Quote View All Quotes View All Quotes |
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Haven't you guys been paying attention, none of this matters, the Army is going back to the 7.62 for general issue, and will be bringing the M14 back any day now.
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Gotta be a zero missing in there. View Quote Hell no way is a FNH barrel only good for 5,000 rounds. That means the M249 and M240 barrels are toast by that point to.... This honestly looks to me like a scam since the H&K didn't perform the best in Class I-III they had to justify it by pencil whipping barrel life. |
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HK makes good military barrels. Fancy metals, melonited, then chrome lined, with a tapered bore. View Quote View All Quotes View All Quotes Quoted:
HK makes good military barrels. Fancy metals, melonited, then chrome lined, with a tapered bore. Quoted:
Fancy metal, CHF, melonited, chrome lined, with a tapered bore. Best military barrel on the market imo....Well not the civilian market..... What alloy is the 416 barrel made of? What alloy is the MR223/556 barrel made of? Does it have a tapered bore too? |
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Obama ended all the wars, so I have no idea what it is these days. I am curious to know as well. View Quote View All Quotes View All Quotes Quoted:
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How many rounds does a regular big marine corp 0311 run through a carbine in a 3 year hump? With qualification, a six month tour, etc I am curious to know as well. An 0311 should qual. once a year and will go through quite a few training evolutions. I would estimate between 1500 and 2500 depending on the unit and weather they were slated for a MEU or a tour in the Afghanistan. Lots of training is done with cold weapons or blanks and BFAs (in which case the goal was not to pull the trigger) |
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How many machines exist that are capable of building a barrel like that? View Quote View All Quotes View All Quotes Quoted:
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Fancy metal, CHF, melonited, chrome lined, with a tapered bore. Best military barrel on the market imo....Well not the civilian market..... @joglee Does H&K use GFM hammer-forging machines? |
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We don't know how they came to that est. Barrel life. And MARSCORSYSCOM wouldn't tell me how either. Fact is HK was slightly more reliable than the Colt 13 stoppages vs 20, however it broke way more often, 20k vs 60k. Look, there is no way you can tell me with a straight face Colt barrels only last 1,600 rounds. You just can't. View Quote |
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Sourced from Colt Canada? Or does Colt Defense have its own CHF machines too? View Quote View All Quotes View All Quotes |
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Because they aren't CL or even melonited? View Quote This is why battlefield Vegas burned through theirs so fast. Nothing to protect the barrel from the heat. The civilian barrels would be like having Vulcan/Hesse, making barrels for Colt. |
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