谁能翻译下PX4的说明书

abcnba001

很想知道 PX4 是替换出来的。还是，改了什么枪。
如果，要替换怎么用？
Mod Name : PX4 - Reborn
Create: realaxmax , Taiwan

Feature:

1.Reskin PX4 let Slide turn into gray. (In gameplay more alike silver )
2.Appear real BERETTA PX4 STORM marked in slide.

This is my first time create MOD by myself. Maybe not so good than other MOD creator.
Because original files only pixel 256 X 256 , i don't have another way to raise quality.
Whatever, any feedback i will listening ^^