in my opinion the 18 is a great gun for a collector. but useless otherwise. ill state my reasons.
it has a 33rnd 9mm mag. and it will empty it in usually 2-3 seconds. i have fired one of these. and the accuracy.....well it sucks lol single fire mode. its great....but when the two dots are involved...........nope.
any SD scenario you have that you put 33 rounds into someone....your GOING to have problems with the DA and it will no doubt be a case of excessive force.
the 33rnd mag looks utterly stupid when carried. and is impossible to conceal. so you would have to OC a 10 inch stick hanging out of your holster.
it is expensive as heck to pull the trigger once with SD ammo. think roughly $20 a box........so a box and a half to squeeze the trigger and hold it for 3 seconds......
i would love to own one......play with on the raNge.........have a a showpiece, conversation piece or just look at. but would i carry one? probably only if it had a 3 round burst capability and the cyclic rate was dropped about 100RPM