Where are the piston kits??

Which length? I think fabsports in montreal had a mid length still left when I bought mine a year ago. Also Arms East had some rifle length kits available. Adams arms kits are rebranded and sold under different names. I believe the core 15 uses them and Christensen arms. Last I checked Adams arms didn't have the DOS export permit thing that allows them to ship outside the states. This information is about a year and a bit old so Adams Arms might be able to export now and there might be other retailers who have stock now.

If it was me I would try to get my hands on a Christensen arms branded piston kit. It comes with a low profile gas block .750" diameter and chrome Bcg I believe (might be wrong about this). The LP gas block is nice cuz you can tuck it under an extended length Hand guard. Calgary shooting center carries Christensen rifles and maybe others as well.

My info is a little dated so do ur own research to verify. PM me if you would like some more info I spent a couple of months looking for one of these. Let me know how you make out.
 
Thanks for your input

Everyone seems to be out of stock!

Fab sport are out ....

Humm I just check on Christensen site .....It would be even better!

Still looking
 
Yeah I had to call. It said out of stock on website when I ordered mine too. Also a nice thing to have with one of these kits is a POF or LWRC anti tilt buffet tube. Calgary shooting center carries Christensen arms.
 
Can anyone comment on the effect that a piston system would have on an AR versus the stock gas impingement system?

As an M14 owner I've been a little envious over the apparent ease with which AR's can achieve precision of MOA or less. Much of the difference has been attributed to the gas piston system of the M14. This seems evident when an m14 to AR10 comparison is done.
 
Pr589 said:
Can anyone comment on the effect that a piston system would have on an AR versus the stock gas impingement system?

As an M14 owner I've been a little envious over the apparent ease with which AR's can achieve precision of MOA or less. Much of the difference has been attributed to the gas piston system of the M14. This seems evident when an m14 to AR10 comparison is done.
Click to expand...

The piston system isn't the only reason. The AR essentially abides by the most common principles for an accurate rifle. Synthetic stock in this case alluminum as part of the actual receiver. No bedding required. The way the bolt locks up, barrel quality, free floating the barrel and match triggers are also a factor.

That being said all things being equal you lose accuracy with a piston system. Thicker or higher grade barrels are often used to counter this. The core AR15 piston for example has a SS barrel vs their CL for DI. The decent rifle piston systems as part of a complete rifle package are able to get equivalent DI accuracy for military grade or sport shooting. But they do so at higher cost, usually more weight and by using higher end components. It's much easier and cheaper to get excellent accuracy from a DI system. Also for the ultimate accuracy potential such as sub .5 Moa approaching 1/4 Moa then you'll need a DI with match barrel, trigger, optics etc.

ADCOR has a unique hybrid piston system that feeds off the barrel by a tube to a piston which is contained in the upper free float handguard. The piston isn't directly attached to the barrel. The piston pushes on a long rod connected to the carrier group. There isn't any slapping of the bolt by the piston. This system also counters the piston movement interacting with the barrel. Accuracy is supposed to be on par with DI rifles while giving piston reliability.
 
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