Originally Posted by buckhorn_cortez
Is this because no other rifles use a piston except...the M1, M14, AK47, FN SCAR series, SIG, H&K, etc.? Quite a history for a "fad."
If you want a piston rifle, look at the Barrett REC7. Here's a link to a discussion on an AR Forum
about the REC7 - complete with photographs of the piston system, bolt, etc.
I considered it initially, and while I liked it for its long stroke piston, I preferred the PWS because the BCG and the op-rod are one piece. To me that makes much more sense, the less moving parts the better IMO and if the op rod is attached there's less of a chance of damage from the striking of it on the gas key. For me the PWS made more sense than the Barrett.
And one thing that you won't find on the PWS that you find on just about EVERY piston AR; no gas regulator. There's nothing to adjust on the PWS, just load up and fire away.
The manufacturer says it best, it's an AR with AK DNA. They've tortured this thing and it runs like a champ. Too bad it'll be hell to get parts in 10 years. I should start collecting spare parts from now....seriously.