I have to say this has to be one of the best pumps I have played with (coming from everything you can name of). Light. Very solidly built, like everyone has mentioned no play from the pump handle, fluid-effortless pumping kind of harder to misfire during rapid A/T versus CCM (or maybe I was never pumping right nah jk I'm pro) since holding the trigger sorta forces the pump out more (AT based like ccm's seem to misfire if not timed correctly) I like that you can play a lot tighter especially now that there's no reg/grip when pushing against a a bunker, and no backblock/midblock to worry bout getting dirty or slapping your mask.. especially those folks who like running smaller stubby tanks.
Somethings I didn't like..
I managed to break paint which was something I was worried about the first place (versus sniper base ie: take off bolt to clean up really bad ball breaks etc.) but not too big of a deal the paint goo seemed to disappear quickly probably cause of the brass bolt, I kept on playing with no trouble.
I still found myself using a little piece of grip tape on my Revy because the clamping feedneck couldn't quiet hold it down that well.
No manual? That's how Bob rolls, springs and o-rings are included I'm still iffy bout breaking it down like the youtube videos posted. I'm sure with time and experience it will be easy like ABC's cause I can breakdown/maintain snipers/ccm/buzzards,etc. just fine
(for the love of god he put brass in it). 
