Who has the perfect brass catcher?

Why do most Asian military or paramilitary forces like to use

Akuna Brass Catcher II -The Firearm Blog

Caldwell Universal Brass Catcher Does Work For An AK : r/reloading

Akuna Brass Catcher Lake Havasu City AZ

Ultimate Brass Catcher, optional 12” stem

Mini 14 brass catcher

Caldwell AR15 Picatinny Rail Brass Catcher Review

AR platform SHORT FRAME-THROW LEVER MOUNT brass catcher - Tactical

Who has the perfect brass catcher?

Brass Catcher by NOVA- with Picatinny Rail Mount and Heat

Caldwell AR Pic Rail Brass Catcher