The Walther P22, which is actually manufactured by Umarex, is one of the most popular .22 pistols in the USA Today. The outside of the gun resembles a hammer fired P99, while the internals of the gun utilize a blowback action like you would find on a Walther PPK. The P22 feeds from a 10 round magazine, and requires higher quality ammunition in order to function reliably.
Walther P22 (8/20)
Submitted to "The Best Walther Guns of all Time"