Anyone using a piston for there .300?

[PFDD]

I thought about it since I run the LMT MRP piston upper with a 12 in barrel which is normally supressed, but figured there were already too many variables with subsonic 300 Whisper to mess with on my first build. In addition, given the MRP uses proprietary barrels, I would have required a custom barrel from an experienced entity like TP555. That was doable but I wanted to see if I was committed to the Whisper first and settle out the other details.

A conversion unit like the Adams Arms might be viable, but I'm not planning on high volume fire with the Whisper and the piston uppers shine with short barrels, full auto or primarily suppressed fire because they do cut back on the crap deposited back in the chamber and in your face. The volume of fire I intend is directed towards feral hogs and play so not enough volume to make a compelling argument for piston over direct impingment in my case.

[Medic650]

I looked at a retrofit piston system a gunshow today that a dealer had on his personal gun. I don't know if it will work on a whisper but I may get a pistol system to try on my upper. Alan from Machine Gun Tours swore by it.
Adams Arms piston system. 3 position gas block, standard, suppressed, and off. http://adamsarms.net

[TerroristHunter]

I have a piston retro kit on my 16" carbine and it's turning out to be a challenge. Have performed many mods to barrel and action and still have function issues...