I'm back with another r10 mk2 ...

Old stock and this one is holding :)....this is my third one but so far so good. I bought this one from myhighpressureair.com and I couldn't resist trying a another . Gun shoots 18s great just like the other ones and the camo stock is actually wearing on me :)
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Is that a warning? LOL! You must really like something about them guns to be on your third one. I must say, I have never been a big fan of bottle guns, but I absolutely love the looks of that R10, there is something about it that just calls to me, but in Walnut though. 

Hope this one does good for you. The BSA barrels are supposed to be really good too. Good luck. 
 
If you end up having issues with yours again, I have a mint condition R10 MK2 22 cal in Walnut with extra magazine and an included aftermarket Weihrauch moderator that I would be willing to part with. Has been holding air since I got it two years ago and loves the 15.89g JSB’s. It’s sitting in a case, not shot much due to excess other PCP’s I own. 

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rwsmike they are great rifles. Once you hold one and shoot it you want it. Hopefully this one does hold air and you get to keep it. 

Crossing my fingers for you! I like mine so much that I want one in .177. What fps are you shooting the 18's at? Mine prefers the 15's but I might not have found the right speed for the 18's. I have the black wrap but the camo is growing on me also.

Rodeo mine shoots the 18 gr. accurately from 25 fpe up to 28 fpe. I was shooting it using 26 fpe but my factory regulator finally took a crap. When I replaced it with the huma regulator I tuned the hammers energy to the setting the huma came with and it ended up at 28 fpe. The 18 gr JSB are extremely accurate out of mine at 28 fpe.

The R10 is such a good rifle theres only a couple things you can do to improve them. You can make an anti bounce rod that increases shot count and lowers the report since you are not using as much air per shot. RAW sells a carbon fiber bottle thats 480 cc that lightens up the rifle and gives it more than double the shot count. You can also remove the factory shroud and use a screw on silencer to make it quieter and shorter. The factory shroud doesnt pass the air down the tube past the muzzle so its a waste of space. You could modify the shroud but screw on silencers especially if its designed as a reflex style will be much quieter. I have done everything except the carbon fiber bottle and anti bounce rod but if I keep it I will be doing those two things.

rwsmike keep us posted on the new R10 I hope it does everything you want.