Magnum3.0 Gun Custom Simulator

v1.0596
* Added H&K HK416A7.
v1.0595
* Added AI AX50 ELR.
* Added Walther PPQ M2.
v1.0594
* Added FN SCAR-SC.
v1.0593
* Added Izhmash ShAK-12.
v1.0592
* Fixed a bug in the background object market.
* Fixed the slide stop behavior of G17gen5.
v1.0591
* Added Glock17 Gen5.
* Added summary to ammo list.
v1.0590
* Added SERO GM6 Lynx.
v1.0589
* Added Interdynamic KG-9.
* Added Ingram MAC-11.
v1.0588
* Added H&K G28.
* Added some optical scope and laser sight.