So after thinking about this for a while going to go with the scar.
Dont wanna solder, and the adapter sucks apparently so their is no point in getting the 416.
Found out that there is an upgrade for the scar stock "problem" and that the "problem" only occurs after you drop the gun, which isnt a bad tradeoff since if you drop any gun, something most likely will break.
Also decided on the scar since im familiar with the platform. Also alot less of them out there.
Lastly since i like to switch hands alot, it comes ootb with ambi controls
saving me some money on a mag release and an adapter.