Adams Arms Piston kits?

[Artful]

I read the review in the new SAR and have seen demos of other piston uppers and was wondering if anyone has tried one of these?

[Ethereal]

I went out and had the PWS piston kit put on. No problems so far, just kinda funny having an operating rod attached to my BCG and no gas rings. One thing I didn't notice was a reduction in recoil like most advertise. Oh well...