DanielDefense or BCM for the upper would be a fantastic choice - can get those from BC-USA, G&R, GTS (with installed rail of your choice).
Mixing and matching isn't against the rules - my newest lightweight from G&R is a DD Barreled Upper, Sabre A2X Hider, TROY Rail and sights; running a BCM Charging handle and Bolt Carrier Group.
عندما تصبح الأسلحة محظورة, قد يملكون حظرون عندهم فقط
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Semper Fi
"Being able to do the basics, on demand, takes practice. " - Sinister
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