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Posted: 6/19/2009 1:16:50 PM EDT
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I heard that Piston driven weapons are more dependable the one with a gas tube or gas system?
Educate me on this i don't have a clue if you couldn't tell.  
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I suspect that you hear about failures in DI AR15s more because there are about 8 million of them in circulation than because their failure rate is any higher than any inherent defect of direct impingement action. No gas piston AR conversion has 0.01% as many units fielded as there are DI Stoner rifles in use in the world. Nor has any gas piston conversion been in constant use for the past 45 years.
I own 2 DI ARs which function perfectly. I also own 2 gas piston rifles, but then again the AK was designed around that gas piston. BSW |
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Piston is a "gas system".
The difference is that with a piston you put the expension chamber/cylinder out on the barrel and couple the mechanical energy via a metal rod; in an AR15 direct impingement design the expansion chamber is inside the bolt carrier and exerts force directly on the operating parts. With intelligent design choices either is a good system. With less than intelligent design choices either can be problematic. There is nothing inherently wrong or unreliable with the standard AR15 direct impingement system that needs to be corrected by changing to gas piston operation. ETA: Check this nearly identical thread for links to other nearly identical or informative threads: http://www.ar15.com/forums/topic.html?b=3&f=118&t=447384 |
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This subject has been beaten to death so much there must be novels of info on it around the net of this and various forums. I find it doubtful you haven't read pages and pages already and are just trolling.
http://www.pensalmon.com/images/fishing_trolling.jpg Hey i just had a question i don't spend hours on end researching this shit i just had a simple question sorry for asking. |
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Quoted:
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This subject has been beaten to death so much there must be novels of info on it around the net of this and various forums. I find it doubtful you haven't read pages and pages already and are just trolling.
http://www.pensalmon.com/images/fishing_trolling.jpg Hey i just had a question i don't spend hours on end researching this shit i just had a simple question sorry for asking. Ok fair enough, but there is alot if you look around. I'll say that I've owned both, shot many different rifles with piston actions over the years and many DI AR's, served using DI M16's and M4's and mainly own M1A's now which are piston rifles. A DI AR can be a good and reliable rifle from what I've experienced. There is a difference though and important to me in how the DI system puts so much high temperature gas onto the bolt and carrier group with it's spring and small componets that I don't care to own another. I haven't ever broken a bolt myself, but I've seen enough for my taste from basic use. I've had enough of my share of FTE and FTF's too. I never liked how the DI system is on lubrication either and what I see as sucking it up. It's not something I favor compared to basically greasing and go with piston guns. It's also much easier to clean piston guns and the main heat and gas goes to the gas cylinder and piston which push alot of it out and are design specifically to that task alone instead of feeding rounds, extracting and ejecting besides. My last AR was a POF and a very good design in my opinion. |
| After a decade of hands-on with DI, and purchasing a POF piston, I will never buy a DI again9unless I find a real good deal). The bolt/upper in my piston ar stays extremely clean and to me, that equals longer times between failures and more shooting. It seems to have the reliability of my AK. I'm sold on piston, for sure. |
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What rifles other than the AR use DI? Everything else uses piston, but what else uses DI? This question/statement comes up often, with the implication that DI must be bad because it's the only modern rifle design that uses it. There probably would have been other DI type rifles, certainly other designs from Armalite/Stoner, except for a simple fact: the DI system was PATENTED, and Armalite sold that patent along with the AR15 design to Colt. |
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Quoted:
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What rifles other than the AR use DI? Everything else uses piston, but what else uses DI? This question/statement comes up often, with the implication that DI must be bad because it's the only modern rifle design that uses it. There probably would have been other DI type rifles, certainly other designs from Armalite/Stoner, except for a simple fact: the DI system was PATENTED, and Armalite sold that patent along with the AR15 design to Colt. I have nothing against DI. Well the DI patent should be up. Piston is the flavor of the day I guess. It'd be interesting to see what other designs could be designed around DI. |
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