ISSUE #1 is taht you have an AR-15 rifle buffer in there.
ISSUE #2 is just pure bullpoopy. 3 of the big ARs I have are Aero M5 sets. Not one single one of them is running any special mag release, at all. They're all running regular run-of-the-mill AR-15 mag releases, and buttons. All of them.
You are mistakenly thinking that you need to bury that mag release button on the threaded stud until it's flush - and you don't. There's PLENTY of engagement on a standard release, and a standard, non-fancy button.
What you're not understanding here is this - for many, many years, the large-frame ARs have been around. For all those years, there was never a special mag release assembly for these large ARs, and everything worked fine - for all those years. Now, companies are cropping up everywhere, customers are asking questions, and companies are either making new parts to satisfy customers that don't know the difference - or the companies don't know the difference.
Now, as far as Aero goes - I don't care who you spoke to, what they told you, etc. That doesn't make what they told you accurate, or unarguable. How many of those guys built a large frame AR 10 years ago? What mag release setup did they use then?...
I'm telling you, plain and simple, that my Aero M5 lower receivers all have regular AR-15 mag releases and buttons in them, and they all function just fine.
Now, please explain to me how you can't install a regular AR-15 mag release asembly in an Aero M5 lower receiver. Please, explain to me that it doesn't fit, and doesn't work.-