I have always loved this rifle since I was like 11.
imo It is a beautiful rifle. I want one
Are these legal to own?
From what I see, they're mostly in military service, I imagine that if you're in the states you could get one by pulling strings or find a civilian model (this is probably the case, the British L85 is non-existant on the civilian market, but Prexis are making
a kit for civvies to buy and assemble.)
I heard it is a rotating bolt or something. Is it something like the p90 feeding system?
It is somewhat, the P90 has a magazine where the rounds are aligned at 90 degrees horizontally to the chamber, and are rotated into place by a mechanism in the frontmost portion of the magazine which rotates them to face the chamber and prepares them to be stripped off. The G11 has a similar magazine where the rounds are rotated 90 degrees vertically, and the complex internals rotate and chamber the caseless round.
Here is a diagram, the orange-yellow mass is the bolt/loading group, and to everyone illiterate to clockworks/engineering, it looks as if the G11 has been raped by a swiss clock, I imagine it's complexity doesn't make it terribly attractive in jungle/desert conditions, where it all might lock up.
On top of that, fully automatic fire is limited to bursts, as there is no case to carry some residual heat out, and despite the higher flash point of the propellant, it's likely that firing a long burst would temporarily heat the barrel up enough to cause the weapon to fire prematurely, potentially damaging those precious mechanics.