I'd love to hear exactly what makes the MP5 worse than, to take a few examples, the Type 100, Villar Perosa, Reising M50, or PP-90M1, especially when compared to the KRISS (the company hasn't been called TDI for over four years now) Vector, which has a manual of arms straight out of 1921 and advertises (ad nauseam) as new a principle patented in 1923 and in service en masse in 1939.
...Vector, which has a manual of arms straight out of 1921 and advertises (ad nauseam) as new a principle patented in 1923 and in service en masse in 1939.
Sorry to ask, but what exact models of gun employed a Kriss-like action back then? I can only really think of the Mars/Luger toggle action, though of course they're right side up.