Glock mags. Ambi ejection? Why sounds like a waste of money and additional entry point for debris. Don't need ambi ch. Just make it a conventional ar charging handle. Handguardwise try and make the attachment standard ar. People can customize to their desires give it a basic mlok handguard.
Lighter is always better. Don't need some nuts cf barrel. Just a good steel barrel will do. I would prefer the take down but not having it isn't a deal breaker. Thread the barrel as well please.
Made in canada is preferred. Made in a first world country is a deal maker or breaker. I will not buy if it's made in some 3rd world ####hole.
Price point lower is better. But the quality needs to be good. Because the cx4 storm is still there as is the skorpion evo(although it is restricted)