Try to answer the following questions WHY HAVEN'T THEY TRIED TO DESIGN AND (POSSIBLY) MASS PRODUCE...? HK G3+its assault rifle derivatives -a lighter version -with integrated rail system Comment:The G3 platform is one of the best ever made.Why didn't they develop it/why did they abandon it? M16 -with short stroke gas system(Until HK416)? -with foldable buttstock(redesigning the working mechanism)? Comment:Colt and the other manufacturers had 50+ years to switch to short-stroke gas piston.Why did they stick to the direct inf.??!??! M14 -a lighter version of it, less bulky? -an assault version of it(chambered in 5,56)? Comment:The M14 has a great, battle-proven design, but it has defined as bulky, heavy and too long.Why didn't they tried to build lighter rifle, possibly an assault rifle? AK -A short-stroke gas piston rifle? -a 10 cm (a little less than 4 inches) longer barrel(To match the m16 one's length)? -an integrated rail system(I mean...top cover+gas tube)? Comment:AK platform is very reliable but even well known for being uncontrollable and inaccurate.This problem might be solved with a longer barrel ans short-stroke piston gas system.Why haven't they never attempted to do it?