I don't want to hijack the topic and will only say this.
If an item is built well (correctly), I don't mind buying perhaps an airsoft grip, stock, forend, light or scope mount, etc. if I want it and can't get it anywhere else.
I won't compromise the safety and integrity of the gun for it though.
Another weapon that is very much in-line with airsoft parts is the little GSG 22lr mp5.
But then again, GSG got their start in airsoft, so maybe that is to be expected.
Matter of fact, I'm pretty certain that my MP5 skeleton folding stock is likely an airsoft or at least a knock-off repro. All I know is it doesn't have B&T stamped on it anywhere, and I sure didn't pay $250 for it either. Seems like I recall paying about $85 for it. It's a dang fine stock too.
Back to the regularly scheduled program, after a couple years of no product from magpul, I lost interest in the masada. And then Bushmaster had it a few more years after that doing something with it, and when they did release it, it had a msrp of what I could buy a transferable Mac machinegun for, and it was a no brainer which to get. I have the machinegun.
I think one of my favorite things about the masada would be the left side charging handle. That just appeals to me.
I still like them and would like to get some time behind the trigger of one. Let us know how it does.