Originally Posted by furioso2112
I don't know enough about them to say if they are worth it, but Bushmaster makes a $400-ish piston system that can be used in place of the gas system on a typical AR. Build an with the system, and you can likely keep your cost under $1000 (parts build an economical AR minus the cost of the parts you don't need (as they are replaced by the piston system - like the gas tube/gas block, etc.), plus the cost of the piston conversion system). Midway had a sale price of $399 IIRC on the Bushy gas conversion system a couple days ago, probably still in effect. I don't know if that is a competitive price on the system or not, but it is a reference point.
I bought a Sig556 (it's piston-driven action) and soon after bought an AR as I wanted the parts interchangeability and options that the AR platform offers. I considered selling the Sig, but then I cleaned it and remembered how easy it is to clean, what a nice quality the components are, and how low the market is right now...so I have decided to keep it.
BTW - nice avatar!
I considered that (just buying a Bushy piston upper and building a gun) but I figured by the time I got done doing that and getting it tricked out the way I wanted it after starting from scratch (w/ all Bushy parts mind you) I would not be that far off from the price of their gun (turn key version).
I wish now I had just kept my old 16 Bushy AK carbine :(, all I would have needed would have been a complete piston upper, an M4 style stock, and some sights. :( Oh well.
Thanks on the avatar. Not too many people can name him.