During World War II, the Germans first pioneered the assault rifle concept, based upon research that showed that most firefights happen at close range, within approximately 300 meters.The power and range of contemporary rifle cartridges was excessive for most small arms firefights. As a result, armies sought a cartridge and rifle combining submachine gun features (large-capacity magazine, selective-fire) with an intermediate-power cartridge effective to 300 meters. To reduce manufacturing costs, the 7.92x57mm Mauser cartridge case was shortened, the result of which was the lighter 7.92x33mm Kurz.

The resultant rifle was the Sturmgewehr 44 (StG44). An earlier firearm, the Italian Cei-Rigotti combined similar features but suffered poor reliability and ejection mechanism, as well as inferior magazine capacity. Towards the end of the war, the Germans fielded the StG44 against the Soviets; the experience deeply influenced Soviet military doctrine in the post-war years.

Come on, as if the Soviets had the technological capacity to copy the MP43/Stg44 weapon.

Towards the end of World War II, the Soviet Union saw the need for a strategic bombing capability similar to that of the USAAF. The U.S. regularly conducted bombing raids on Japan, virtually in the Soviet Union's backyard, from distant Pacific forward bases using B-29 Superfortresses. Stalin ordered the development of a comparable bomber.

The U.S. declined to supply the Soviet Union with B-29 heavy bombers under Lend Lease. However, on three occasions during 1944, individual B-29s made emergency landings in Soviet territory after bombing raids on Manchukuo and Japan. In accordance with the Soviet–Japanese Neutrality Pact, the Soviets were neutral in the Pacific War and the bombers were therefore interned and kept by the Soviets, despite American demands for their return. Stalin tasked Tupolev with cloning the Superfortress and Soviet industry was to produce 20 copies of the aircraft in just two years. The three B-29s were flown to Moscow and delivered into Tupolev OKB. One B-29 was fully dismantled, down to the smallest bolt, the second was used for flight tests and training, and the third one was left as a standard for cross-reference.

Do you know that Mig-29 is VERY similar to F-15???

The Mig-29 is very similar to the F-15 because it was designed to compete against the F-15. It is cause and effect.

The F-15’s record book is not yet complete, but thus far, it has put together a victory tally of 104 to zero . Flown in combat by the US Air Force, the Israeli Air Force, and the Royal Saudi Air Force, the fighter has never been defeated in combat.