Chamber the HK416 for 7.62x39 and 7.62x51 with all lowers being completely interchangeble and as many as possible upper rec. parts being interchangeble as well. I’m a huge fan of HK design, build, mystique, reliability etc. Remember the all the cool HK ads back in the day? For that matter, re-design a partial polymer HK93 or 91 in order to reduce weight. Why do spook types dig the MP5 etal.? It’s basic operation is very reliable, as long as it is manufactured to HK spex.
Just my dbl. tap..
the Deets
It is a very reliable design. I have a genuine (full auto, suppressed) MP5SD3 that is an absolute bullet hose, but that integral suppressor sure gets hot!