One of the problems with the LWRC systems is you must remove the top handguard to service the piston linkage. Any laser or sighting devices installed on the top rail has to be re-zeroed again.
The Colt and LMT systems pull out the front of the gas block and don't require any handguard removal. Plus they use a true monolith system.
On the HK system, the entire handguard must be removed to service the piston linkage, which again I don't like.
Last edited by scottryan; 04-21-17 at 12:16.
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Each family of weapons is a unique compound machine. But they are made up from the same basic six simple machines. They all follow the same laws of physics. Once that is understood, it's easy to see the similarities. It becomes easy to understand, for example, that the gas holds more heat at the gas block and how it cools as it travels through a tube. It becomes obvious that the face of a small diameter piston exposed to gas with more heat is going to get hotter than the face a larger diameter piston exposed to gas holding less heat.
That does not translate into "A" is bad and "B" is good, it is a simple statement of fact. People started repeating the marketing hype of how a "piston" system is cleaner and cooler than a "DI" (sic) system without looking at the science. Just like they started repeating how a "piston" system is heavier and has more recoil, again without looking at the science. Baloney!
The ammo is going to generate the same amount of energy in the form of heat and recoil and the same amount of fouling no matter what gas system the weapon it's fired in uses. If there is extra recoil because the reciprocating mass is moving too fast and bottoming out too hard, the weapon is over gassed.
A "piston" AR might be two, three or maybe four ounces heavier because the op rod might be that much heavier than the gas tube it replaces. Most "piston" uppers that are heavier have heavier profile barrels.
Because of your challenges, I have taken a closer look at the science because I know the science is right. Examining the science closer has helped me understand it better. Pistons still get heated and coated with fouling whether they're part of a long stroke or short stroke system, or if the piston is in the carrier or the gas block. Lube helps keep fouling moist and soft. Heat causes fouling to dry and harden. Do any of the systems you're talking about change these facts? Don't be dismissive. Show me the science
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I'm seeing a strawman appear here regarding the cleanliness issue, and interestingly enough I'm also seeing some take on advocacy for the strawman after the fact. This seems futile to me - I can't think of any trends in AARs from classes, the field or the range which have either system failing *with* proper lube strictly due to gas related fouling which would be exclusive of the other of the two systems. That is to say, there are just too few circumstances where one would be found saying, "if only I had been running the other system, my weapon wouldn't have failed due to this gas-related fouling." Being clean isn't an issue at all, but it seems like that is exactly where this discussion has fallen.
Our Stoner rifle was designed from the ground up as is - not as an external piston design. That in itself lends a sort-of home field advantage to the traditional "DI" system in an AR versus a proprietary external piston. What I'd truly like to see is a good discussion worthy of M4C which more technically discusses the pros and cons of the Stoner's "DI" versus traditional piston systems in a nutshell, as if a whole new weapon were being developed here in M4C. I'd enjoy reading and contributing to that, but that's just me.
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I don't need science to see that a short stroke piston AR has less fouling in the upper and lower than a tradition DI gun.
That is a fact, and if you had had anything but theoretical knowledge on the subject matter, you would also have seen this. Get one and shoot 1000 rounds side by side, and show me the difference. If you deny this, you clearly show that you don't know what you are talking about
There is less heating of the bolt, bolt carrier and associated parts on a short stroke piston gun than there is on a DI gun. That is fact, and has been measured using heat imaging. I'll try to dig up the images later today.
Barrel, chamber and gas block temps run about the same, depending on barrel profile. I'll try to dig up the images later today.
Last edited by Arctic1; 04-21-17 at 14:44.
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Nobody ever got shot climbing over the wall into East Berlin.
Delivering the most precision possible, at the greatest distance possible, with the highest rate of fire possible.
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