A co-worker of mine bought a AR about 6 months ago and has fired a total of 1K rounds throught it and he told me he met an AR guru that told him to replace the DI system with a piston system cause the gas tube melts and gets shorter every time you shoot it. I told him my opinion that the person he talked to is full of crap I have had my rifle for 3 yrs and had never has a problem like mentioned above with the gas tube. Has anyone herd anything like this?
AR piston system
- Thread starter SATX man
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Carter
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Negative. I believe that person was talking out of his ***. As do a lot of people that are randomly met. I love piston systems, but not too much on an AR that has been converted. The hole the piston goes through is small, which means the piston has to be smaller. They can break easier, then you're "boned". But AR's built around a piston don't have that problem.
Your DI system should be fine as long as you clean it and lube it. What kind do you have?
Your DI system should be fine as long as you clean it and lube it. What kind do you have?
rcmodel
Member in memoriam
I have owned and shot AR-15's since 1970.
GI issue M-16's before that.
None of my gas tubes have suffered shrinkage in the slightest.
None have ever needed to be replaced due to "melting" or any other reason.
The "AR guru" guy is full of crap!
GI M-16 rifles & M-4 carbines are capable of full-auto fire, and the life expectancy of them is will over 10,000 - 15,000 rounds.
Probably the first thing to go will be extractor spring, then bolt gas rings, and then the rifling in the barrel. But even those will go thousands & thousands of rounds.
PS: Another thing to consider is that in the event something does happen to yours, you can buy a new gas tube for less then 10 bucks at some gas stations / gun shops.
Try finding a new proprietary piston upper part anywhere except from the manufacture, if they stay in business until you need one.
rc
GI issue M-16's before that.
None of my gas tubes have suffered shrinkage in the slightest.
None have ever needed to be replaced due to "melting" or any other reason.
The "AR guru" guy is full of crap!
GI M-16 rifles & M-4 carbines are capable of full-auto fire, and the life expectancy of them is will over 10,000 - 15,000 rounds.
Probably the first thing to go will be extractor spring, then bolt gas rings, and then the rifling in the barrel. But even those will go thousands & thousands of rounds.
PS: Another thing to consider is that in the event something does happen to yours, you can buy a new gas tube for less then 10 bucks at some gas stations / gun shops.
Try finding a new proprietary piston upper part anywhere except from the manufacture, if they stay in business until you need one.
rc
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If your buddy can get his AR hot enough to melt a stainless steel gas tube, I'd like to be around to see those fireworks. Well, I don't know that they are all made of stainless. All the ones I've had were. I'd have to call BS on that and tell your buddy to find a new guru.
That having been said, I converted one of my carbines to an Osprey piston system and I'll never convert it back to DI. I like it. The carbine runs cooler, cleaner and doesn't require as frequent lubrication. Still, there's nothing wrong with DI. A well built DI rifle will run slicker than snot and will run VERY dirty as long as it isn't dry.
Would this guru happen to be a dealer that sells piston systems?
That having been said, I converted one of my carbines to an Osprey piston system and I'll never convert it back to DI. I like it. The carbine runs cooler, cleaner and doesn't require as frequent lubrication. Still, there's nothing wrong with DI. A well built DI rifle will run slicker than snot and will run VERY dirty as long as it isn't dry.
Would this guru happen to be a dealer that sells piston systems?
Carter
Member
Noveske is a great AR. You're good.
Carter
Member
Haha. Awesome. You have to admit one thing...he did a great sales pitch...to an uninformed person.
Quentin
Member
... and how does your buddy's AR work now? Gotta be 100 times more reliable and not a micron of grit anywhere. 
Tell him to keep his spare DI parts... just in case...
Tell him to keep his spare DI parts... just in case...
Hatterasguy
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DI is fine, piston shines more for military use than civilian. If your just punching paper and maybe hunting you won't notice the difference, save your money.
rcmodel said:
And what part would that be exactly? I have two POF rifles, one in .223 and one in .308 and they're ridiculously simple!! There's no gas key to break off, no gas key bolts to shear, no piston spring to wear down, no gas tube to plug or corrode, no gas rings, the same standard extractor and spring, an FAL gas plug (readily available) a solid piston and an op rod, both of which a nutless monkey could make in a pinch. I'm curious as to what's going to break such that the rifle will be rendered useless from that day forth.
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