Interesting thought... I wonder how hard it'd be to do that?
I was thinking the same thing about the rough feeling/grinding during the cocking cycle on the B3's. I was thinking of using MolyFusion inside the reciever and compression chamber after being honed & polished. Also in the barrel.
There are 2 members at rimfirecentral.com named ToxicSports and Skeeter27Red that have used MolyFusion on rimfire rifles, Airguns, Engines and have nothing but good things to say about it. I believe it was Skeeter27Red that used it in an Airgun barrel and gained something like 15 FPS after the treatment. He shot a full tin of pellets to make sure it wasn't dieseling. He also said accuracy improved a small amount.
Now I figure if I use this in the reciever, the cocking cycle should smooth out a bit. Treat the Piston & Compression chamber, then they'll be slicker than pig snot. Maybe even the spring? And then the barrel. Reduce as much of the friction as possible and hopefully it smoothes the rifle out, increases FPS a bit and makes the rifle an all around better shooter?
here's a link to the MolyFusion:
http://molyfusion.com/molyfusion1.html