The M16 has full-auto capabilities, the M4 can only fire 3 round burst on auto. The fore grip is mostly personal preference, useful on shotguns or some rifles with heavier recoil. The light recoil of the AR15 design, in 5.56, makes them just a pretty decoration, tho this is just my opinion.
That’s what I’ve kind of thought – but I hoping if there is some ‘Hey you….. , this is why should do it this way! Sort of thing out there that someone would let me know….
Trying to make sure I don’t some really bad mistakes if you know what I mean.