Correct me if I'm wrong.

[MoWog72]

As I understand it the only mechanical differences between the current Crosman 1377 and 1322 is the pellet bolt/probe and the barrel. Correct? (Obviously, the main tube is marked as .177 or .22.)

And the only difference among Crosman metal breeches and other custom (aluminum) breeches found online ...is ONLY the .177 and .22 bolt/probe used to match the barrel. Correct?

The reason I ask/mention this is because I have acquired a few 1377 (.177) pistols at yard sales which I had thought to refurbish or mod as .22 guns with parts sitting on the shelf; including a ".177 metal breech kit" which just needs a .22 bolt to match a 14" barrel.

I also observed (on Amazon USA and other online sources) that the difference between new 1377 and 1322  guns is about $15 US.

Perhaps it might be wise(r)/cheaper to start with a 1377 if you have, or intend to use, a .22 bolt, metal breech and barrel.

Perhaps I have too many of these pistols, and too many "ideas".

Your thoughts? 

[rangerfredbob]

You are definitely correct with the only difference being the barrel and probe

[CraigH]

Your statements regarding bolts/probes and breeches are correct.

[MoWog72]

Thanks for confirming. Finding 3 bargain 1377s/PC77; 2 at yard sales and 1 at a second-hand shop in the last two years seemed to be sheer luck. The worst one I broke down for parts. The other two now shoot well but I prefer the .22 caliber 1322. So currently I have 4 1377s and 2 1322s. This should be enough. 

[Uslanja]

Thanks for confirming. Finding 3 bargain 1377s/PC77; 2 at yard sales and 1 at a second-hand shop in the last two years seemed to be sheer luck. The worst one I broke down for parts. The other two now shoot well but I prefer the .22 caliber 1322. So currently I have 4 1377s and 2 1322s. This should be enough. 

Hmmmmm.......enough?  There's always room for one more