Looks cinda differnt uf u dont get the right for grip
The expantion chamber is very usful if you are using co2 and realy usful if you have a RT/EG. It keeps your gun from freasing up so when you are geeting shot at and your gun needs to cool off ,but u dont have the time. The only option is to hide and that is not fun so bleve me this has happend to me befor. It also lets you fire a little faster and you can have more rounds in a co2 tank than if you dident have one.
No geeting cold so you can stay safe. Bye it it is realy cheep