Lothar Walter Barrel For .22 Marauder

I bought a 22 inch LW (stock is 20, up to 24 available), barrel from Roy at mountain air . He is Crosman authorized service center, located in Georgia. Great guy, cost was $275.00 and it took 3 months to get, but oh so worth the wait. He also provides new air stripper as barrel is slightly larger dia. than stk. Other than that, he has very few upgrade parts, but has all the stk. stuff. 
 
MR-022 For the crosman Mrod LW barrel. Around $100.

The 2264-001 is a misprint in the schematics. It never changed from Gen 1. It is 2263-001. That is the standard crosman barrel and around $40.




Will the MR-022 fit in my Gen 1 .177 Breech? I’m guessing I’d need to swap out the bolt probe while I’m at it.

Yes. You need barrel, bolt, barrel O-ring, and mag to convert calibers. You would want a Gen 1 bolt, but a Gen 2 might work OK. You could just sleave the 177 bolt to 22 with brass tubing.