My Smith & Wesson 78G & 79G

You mean these? I Don't shoot my Co2 guns all that often anymore. The pneumatic and PCP guns cost less to shoot, but when I do shoot Co2 the S&W 78 and 79, Crosman Mark1 and 600 are some of my favorites. My 78 has a 600 piercing cap on it and the poppet needs redone. Have some nice forest green laminate grips coming for the 79.

Careful with the 2240s they can get expensive over the years if you allow the addiction to have it's way. ;^)

https://www.airgunnation.com/topic/the-true-cost-of-my-60-crosman-2240/?referrer=1

Here's my 78 that I've had since the early 70's. The only modifications are a Mac 1 valve, lighter trigger spring and a UTG red dot. It gets about 80 shots per cartridge at 2.5 turns on the hammer spring.

You fergot the very nice grips.

They are nice guns . Here are two of mine. A 78G and 79G. My second 79G not in picture.

Bio, I also failed to mention the custom knurling on the piercing cap that I applied as a teenager with pliers trying to stop it from leaking. We sent it back to SW to be resealed and it worked fine after that. To this day I can't imagine what I was thinking when I torqued on that thing. 

I pulled it out a drawer about two years ago, resealed it and I haven't shot a PB since. Way to much fun. 

"what is the barrel". It's a cut and machined Philippine rifle barrel.