I bought my R10 here, (iirc) from a member. I shot it as soon as I got it and it shot fantastic. A short time later, it leaked, and I had to rebuild it and I got a chance to see how it's made inside out. They are a great design, with the exception of one thing, the regulator. After a full rebuild, I've not had any other leaks, but a chrono showed pretty sorry SD and ES. I've had unreg'd guns far more consistent. After some tinkering with the factory reg, I just couldn't get any decent shots from it, even though at 30M, it shot great. It just had something like 40+ fps ES, and sometimes from one shot to the next it would have 25+fps, so in desperation, I was ready to give up. But, being quite stubborn, I was looking to order a test rig for the reg and realized it wasn't a whole lot more for a Huma. Well, now, that's the best thing I've done in a long time. I got the Huma, it was set at 110BAR. I simply turned it up to a marked 130BAR and installed it. My hammer must have, by shear luck, been right where it needed to be. The thing is simply AMAZING! I can shoot over 60 shots UNDER 10fps ES, and SD in the ONE's. Now it's a true laser, and currently tuned to shoot 10.5gr pellets at 917fps avg. It is not pellet picky at all and one of it's fav's is Crosman's new Single Die black box.
I thought nothing would ever come close to my Airmaks Katran L in .177, but this R10 Mk2 is right there with it in every detail.
So, yes, got get you a R10, they're great guns, well made. Plan on replacing the reg, and having what I consider to be one of the best pcp rifles made.