remember this?

Any guys you remember this?? They were 22lr conversion kits made in Germany by Lothar Walther and imported by Gremmel Enterprise`s in Oregon. You know the Germans and their precise parts... Anyway, long time ago I read an article titled "Bears and Bunnies" where an Alaskan resident used his S&W model 27 in 357 mag to take a black bear in the morning and after installing one of these kits he took some rabbits that afternoon with 22lr ammo from the same gun.. I know there are a lot of small parts to carry but at the time I found the concept fascinating. Now there just collector items. This is what it looks like on my DW 44..