/ Polish military in 1939 in pictures.
I'm not trying to glorify Poland but we've had enough of our own inventions,
our own computers (which were copied by US, in the 30s Poland was THE most advanced in computing science, everything you use today in a computer was at one point invented perfected or dabbled in by a Pole, we managed to advance computing science farther then anyone :) )oh really now, are we dreaming or what??.
[i]During the first half of the 20th century, many scientific computing needs were met by increasingly sophisticated analog computers, which used a direct mechanical or electrical model of the problem as a basis for computation. However, these were not programmable and generally lacked the versatility and accuracy of modern digital computers.
Alan Turing is widely regarded to be the father of modern computer science. In 1936 Turing provided an influential formalisation of the concept of the algorithm and computation with the Turing machine. Of his role in the modern computer, Time Magazine in naming Turing one of the 100 most influential people of the 20th century, states: "The fact remains that everyone who taps at a keyboard, opening a spreadsheet or a word-processing program, is working on an incarnation of a Turing machine." 
The fact is Poles designed both personal weapons and armor/mechanized vehicles that were head and shoulders above the contemporary German and Western design and matched only by the Russians, that Poland was pyss poor and had barely any factories to produce that stuff is another matter.I am ONLY Talking about Small Arms here, not Half-Track's, Armored Car's or Tank's, but, just Small Arms, most of what the Polish Army was using in 1939 was either German (Masuer) or American (Browning) in design.
So by your logic rifles are similar because they use a similar caliber? Thats a pretty silly thing to say :)you better go back and re-read your own posting, I was trying to make sense of you said, which is not always easy to do!,Sokrates: the only, only technical or conceptual similarity between German Stg44 and M1 was that they used an intermiediate bullet,
A prototype is an original type, form, or instance of something serving as a typical example, basis, or standard for other things of the same category.since, I have Manufactured Firearm, let me explain to you, what the term, Prototype means, prototypes will be designed, constructed and tested as the final design emerges and is prepared for production. With rare exceptions, multiple iterations of prototypes are used to progressively refine the design. A common strategy is to design, test, evaluate and then modify the design based on analysis of the prototype. and 50 of a Prototype of a Submachinegun for Military use is very common, before you made Ten's of Thousand's of a SMG, you will make 50 to test in the field, that's still just a Prototype!.You know, "PF" does not issue warning very often, in fact this was the first time I saw one like this one"Please refrain from insulting members, they are allowed to have their point of view in this discussion as well as you. If you can't discuss without using derogatory language, your best bet would be to give the thread a miss".I had enjoyed reading your posting's, that was before you became very rude to me among other's, have you noticed, other's have stop posting on this thread?, did you wonder why?.As someone who has dealt in Automatic Weapon's and have been a Small Arms Manufacturer for almost 30 years, I also have a passion for World History as well, being a Second Generation Irish and Lithuanian American, along with where I live, Stamford Connecticut which has a very large Polish Population, from Fresh of a "LOT" Flight to Pole's who are Daughter of the American Revolution (the DAR), so, I know about the Katyn Forest, Sobibor, the first German Enigma machine handed over to the British came from Poland, the fact that Free Polish Troop's were at Normandy on D-Day, and sorry to say they were also at the Bridge too far! (Arnhem, Monty's Operation Market Garden), along with Free Polish Fighter Squadron's flying P-51 Mustang's, and being half Lithuanian, I am a were of the Yalta betrayal!. and, I don't believe if it's American it's better, I am very open mind in General, when it comes to Small Arms, the British haven't done much, since the Lee Enfield Rifle!, the Russian's Steal from everyone else!, the French, well they are the French, enough said there!, besides, John Browning, the German's, Paul Masuer and Carl Walther are the best Designer's of small arms.