This is the same BT5 A4 you've seen carried by numerous police and security personal around the world. It doesn’t get anymore classic than this. The submachine gun has a full stock and will hold a large battery. The fire selector is ambidextrous, which means it can be operated from both sides. The Hop-up is adjustable and it fires both semi and full auto. It comes with 2 magazines
does the weapon come with a mag with the gun and 2 more or 1 mag with the gun and 1 more?
There are two 200rd magzines in the box. 1 with the gun and a spare.
Is the gun blowback? and how much are the mags to buy?
No, the gun has no blowback. Spare magazines are here: https://jdairsoft.net/ASG-MP5-200rd-Magazine