Originally Posted by Conker
All 416 will have "problems" with front ends, since it's not designed the same as a standard M4.
If you want to swap the front end, why choose an HK416? They are (in airsoft) pretty much the same as an M4, except their front end and upper receiver are higher and has a continuous rail.
I'm just asking about the front rail bc if I wanted to change it up sometime in the future, I would like to be sure that parts will fit. From what I have read and all of your responds, it sound like the JG is the best one for me.