I'm not sure even what an "assault rifle" is. I think it has something to do with its color or the way you hold it something.
Years ago my brother and I each bought a Ruger "Ranch Rifle" an auto-loading carbine in 5.56 mm (or .223 Remington). As near as I figured out that
wasn't an "assault rifle".
However, we decide to dress them up so we bought folding stocks with a pistol-grip (which were legal then) 30-round plastic magazines, a 4X Tasco
scope, and a black plastic fore-end.
Now the gun didn't shoot any faster or harder, but it looked different, and because of its looks it somehow morphed into an "assault rifle".
I later sold it, because there wasn't anything I wanted to shoot with it (well, okay, maybe an IRS agent, but you know what I mean). When my wife
expressed an interest in going out with me to murder Bambi and said she didn't like "kicky" guns (I had a Model 98 Winchester in .30-.30 Win and a
Ruger 77 in .30-'06 Spgfld), I bought her a Simonov Self-loading carbine (Samozharyadni Karabin Simonova, or "SKS"). It was heavy, but didn't
kick much and she managed to get a doe that dressed out at about 95 lb.
I'm not sure whether the SKS was an "assault rifle", but we ate the deer.


1 1/2 inches what use is that. The old law was 4 inches I think pre-9/11 days. 
