The Roles and Weapons with the Squad

[BushrangerCZ]

... and your army lets you modify your weapon (and presumably your kit) as you like?

It does to certain extent, depends on the regiment. But I was talking about my own rifle, for which I have a license and keep it at home (it´s the same one as issued in army). Well, for 300 bucks, it´s brand new assault rifle directly from factory, 3x cheaper than decent pistol, so it´s natural choice.
PS: Just a detail - guys on the picture are not US Army but USMC (it makes no difference I know).