Haha, no, a semi-auto 416 might be. A 556A1 is only KAC-ish money, 3-4K, something like that

I've had mine for a while.
Lol, ok, but looks good anyway, and KAC-ish money is still a lot of money, hahahaha!
So, lerch641 got it into my head to flat top that 20" build and eventually, that idea started to fester and I ended up doing just that:
https://4.bp.########.com/-y3cZksEEQhk/Wgu5p3kXlaI/AAAAAAAArGs/TVWbr3Un93wccQAajRVg2wJZZ1t4ztyqACKgBGAs/s1600/PB142743.JPG
https://4.bp.########.com/-r90mQhzgDz4/Wgu5pwOYoPI/AAAAAAAArGs/hxJfHBTG8E8IzcKrVjXwoEXbIFQUKrQ4QCKgBGAs/s1600/PB142744.JPG
I won't have $$ to buy another C79 for a while, so I threw a carry handle on it for now. Also threw on a set of KAC M5 RAS on there. It's not really a C7 or an M16A4 clone, but I sort of like it.
https://3.bp.########.com/-zvLHQsuClRM/Wgu5p0kw6GI/AAAAAAAArGs/RDT0DJ5Sm-UAVTfU1NxDpiE4kmFD90cqQCKgBGAs/s1600/PB142749.JPG
https://2.bp.########.com/-0Jqclb_tgyM/Wgu5p9gf6nI/AAAAAAAArGs/JLo4J-FEGhkFiPWCrgsKq0wHoQJqlOAIwCKgBGAs/s1600/PB142751.JPG
https://3.bp.########.com/-qtVgSdcuS2Q/Wgu5p5gep9I/AAAAAAAArGs/1DjxwjU-XpkqSzfysxYAa_DEtC4ttkpnwCKgBGAs/s1600/PB142752.JPG
https://2.bp.########.com/-CuYU-peX0ss/Wgu5p3e59iI/AAAAAAAArGs/REFmXPPZS54-CmjwAfw9G5oFDu_CpRchACKgBGAs/s1600/PB142753.JPG
https://2.bp.########.com/-4EPRbFhiiD0/Wgu5p2qwQXI/AAAAAAAArGs/cIa8EvnVu2gwvr4wWhDMDq7bejvRmY-_gCKgBGAs/s1600/PB142755.JPG
The flat top came from a Colt Expanse upper from my spare parts box....ended up throwing the barrel onto the Olympic Arms A2 upper:
https://3.bp.########.com/-JJn9sljirEA/Wgu5wgd4azI/AAAAAAAArG0/ySz4yd6r2CgjROPryorsDJsTWUF2CWx6gCKgBGAs/s1600/PB142745.JPG
Not sure what this is supposed to be either....
https://1.bp.########.com/-MlVhXrd5Mh4/Wgu50ewU-OI/AAAAAAAArG4/gR3mVRXrC6UOqcO1RWNqsg5Va_Ai7sd-wCKgBGAs/s1600/PB142741.JPG
https://1.bp.########.com/-3w8XpIZ18NM/Wgu50VYY-iI/AAAAAAAArG4/0KvyN_aGSQE1sUgiZ9ISwachf-RQCo4QwCKgBGAs/s1600/PB142742.JPG
I'll need a permanent lower for that 16" upper (borrowing it from my Mk18 clone)