Finally the otherwise dull looking 2260 Rabbitstopper is starting to look like the excellent sniper it is. 
Fitted the grip from my 1377 and got the 1399 stock.
Got my Tasco 6-24x50 AOE scope from eBay. 
The ad said World Class but the other ads called it Rangefinder so I'm not really sure which it is. 
It has got that cool range estimating mil-dot type reticle. Illuminated. 
The only "problem" with the scope so far is that I thought the objective adjustments started at 25 feet not 25 yards but since I'll use it on distances beyond that it's really no prob. 
I used 6 ProBlox with a tiny drop of Locktite on them and that works great. 
I'm more likely to shatter the breech than to tilt the scope.

The front grip gave me a few sleepless nights. 
I first painted the pumpgrip from the 1377 black and used that but it looked kind of wimpy so i got rid of it. 
Just when I was about to order one 2250 type grip i remembered that I got all these MP-651K parts taking up space in my workshop. 
And what do you know. With a lot of hacksawing, dremeling, filing, sanding and lactic acid pumping through my veins I made it fit. 
And it looks great!! 

It's the foregrip of my MP-651K.

I cut off the barrel piece and hacksawed/dremeled my way along the upper part of it. 
Then I filled in "epoxy putty" (I'm not sure what the English term is) on 3 strategic places and pressed a wet tube the same size as the 2260 tube against the putty to shape it. 
Then I used strong double sided tape to make it stick. 
I also sanded it and sprayed it matte to make it look like the 1399 stock. 

Hi Joel  

I don’t know if you remember me, but a few months ago I had ask you for some information about gun of the month for August (Rob’s 2240/1377).

Anyway I would like to thank you for the help in finding the information I needed to complete my project gun. I have included a picture of my finished “toy” (that my friends have nicknamed “the killer bee”). It has a Lothar-Walther .25 cal barrel, a PCP tube by Calvin and a “Hornet” laminate stock by Steve Corcoran. A Hawke optics 4-16x44 scope tops the finished product.  

Once again, thank you for the information and keep up the good work on the website!!!  

Cam