Forums / Gun Discussion / AR- adding a piston system

3 years 50 weeks ago, 10:50 AM

zx12rmike

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Has anyone taken a previously gas operational AR and added a piston system to it? How easy/hard is it?

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3 years 50 weeks ago, 12:20 PM

BluedSteelCharisma

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http://www.youtube.com/watch?v=-PWXYUtWY

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3 years 50 weeks ago, 9:19 PM

Ishootdaily

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If you add a Piston to your AR, you need to upgrade your Buffer or it *will* wear out your lower at the buffer tube....

No sir, he fell into that bullet... Never argue with a stupid person. They'll just drag you down to their level and beat you with experience!!
3 years 48 weeks ago, 8:11 PM

jay sedler

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how does it wear out the lower?im building my first ar,and thinking of using a piston later

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3 years 47 weeks ago, 9:52 AM

Reaper308

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piston

it can be hard on the carrier also. Depending on what upper your using, I would look at a good bolt carrier from someone who has experience running them through piston guns

"Proelium Comminus Auctoritate" "Sometimes the light at the end of the tunnel is a muzzle flash."
3 years 45 weeks ago, 4:02 PM

Dmann

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whats the difference?

what are the benefits of changing from gas to piston? Im in the middle of shopping for parts to build an AR just thinking of getting piston instead f gas if there are benefits.
Thanks guys.

3 years 45 weeks ago, 5:15 PM

jay sedler

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its a constant debate.the ar uses direct gas to cycle the action(hot gas is directed into the bolt carier)this causes higher heat and more fouling than a gas piston system.a gas piston system is basicly a rod that impacts the bolt carier as hot gas moves it backward.gas piston guns include ak sks scar ect.they are generaly respected as reliable systems because of the lack of fouling and reduced heat when compared to the ar family.the problems i hear with the retrofit gas piston kits are bolt carier tilt because or the off centered impact of the piston on the carier(some manufacturers have added rear "skis" to the bolt carier to stop this)there are also "enhanced" buffer tubes that extend all the way to the bolt carier in the lower side, being made now,you can find them at tacticalinc.com
other problems include breaking the piston striking face screws and damaging the reciever on 2 pc bolt cariers(i would only consider using piston kits with 1 pc bolt cariers)such as cmmg.gas pistons are expensive,usualy 300 and up,and the piston itself can be hard to remove for cleaning after heavy use.i am building a new ar and have been toying with the idea of using a piston,but i think im over it,at least untill they have been around long enough to have all the bugs worked out of them.most companys have only been producing these kits for a short time,and generaly to satisfy consumer demand.most people who have served in the military or law enforcement will tell you that if you keep your rifle clean and close the ejection port cover in the rain and dust when not in use your rifle will function well.if new technology is your thing,there are now many perminate dry lubrication coatings to eliminate the use of oil and grease and thereby reduce fouling.failzero is one example of these coatings.failzero.com advertises somthing like 20,000 rounds life for an upper reciever when only the bolt,carier,and hammer are treated.somthing like 40,000 round life when upper is treated allso.the manufacturer of my ar si defense offers billet and forged uppers and lowers with failzero coating(the only company i know of that offers this coating)and only $40 more than standard black anodized.have fun,hope ive helped.

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3 years 44 weeks ago, 12:26 PM

Dmann

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wow thanks a million, that was all news to me, seriously. Im definitely going to look up failzero.com in a minute and consider that option. also if you dont mind Im going to look into si defense so I can look at all my options. Do you think daniel defense is another possible option?
Well just looked up SI defense and im getting the failzero treated upper its worth it.
Thanks again.
_Dmann_

3 years 44 weeks ago, 2:58 PM

jay sedler

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ask around.

im newish to the ar15 myself so im not the best one to ask about some things,however i am an info sponge so when i learn somthing that applies i wright it down and compare it to other opinions and facts.ive learned allot from my brother(army)and friends(hunters/comp shooters)who have been using the ar15 for a long time,aswell as other gunslot members to find info.there are lots of guys on here who will help you,who know and build ar15s.si is a good company.i sent them my si lower that i purschased online from another dealer and they fit it with an upper,but in the process they found a minor blemish in the rear takedown pin hole so they not only upgraded my lower but the upper as well in adition to sending me my original parts!as far as their failzero coating you may want to call them direct or leave adyn an e mail because they only offer failzero as the standard grey color,but failzero themselves offer it in grey or black i think.dont know anything about danial defence personaly,but hear nothing bad yet.....so they are probably fine.they make nice handguards.lol.

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3 years 44 weeks ago, 3:34 PM

Nitris

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This video will answer some questions about the AR gas system. There are NO benefits to a piston built semi AR.

http://www.youtube.com/watch?v=Kzfm4pYhIyY

Ron Paul 2012 III
3 years 44 weeks ago, 8:04 PM

jay sedler

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there ya go...

that gun oviously didnt mind heavy use,however if they were willing to put the gun through all that,does anyone else think they may have run it dry to cut down on fouling?in any case it makes a good point about he weapon not NEEDING the piston"upgrade"dosnt it?28 30 rnd magazines almost 1k rnds of amo...way more amo than anyone should ever need to fire that quick under any conditions.not sure i belive there are NO benifits of a piston system on a semi auto AR,however this vid does really ilustate the point that it is not needed.thanks nitris!

CRY HAVOC and let slip the dogs of war!

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