I have run maybe 3-4 stihl 660s, nothing to write home about, they did seem durable
I have pics of you running a 660 in Napa.
I oiled up the shotgun with mobil 1, it actually has a pretty smooth action. everything was bone dry. wasn't too hard to take apart. not easy as an AR15 though. i even took the mag apart and oiled up the inside walls. i find sometimes the follower hangs up on some and a light coat will keep em going.
T1 dated a girl like that.
Ckelp is intrigued by your long slide
Troof. He's a sucker for long slides...