I picked up one of these rifles last night. I'd tried to buy one on Tues. night, but the store only had one left, and some guy put money down on it an hour before I got to the store.
I swapped a Kimber Royal Carry for it, even trade. I already have a Kimber CDP, so I won't miss the Royal much.
I like the Ruger.., very light, as noted above, short and handy. It's very similar to the Mini-14, with its flat-top bolt and plastic upper handguard. Didn't have any problem with dropping the mag, once I figured out to drop it straight down, instead of at an angle.
I think it's a great little carbine, plenty powerful enough for whitetails, in the heavy woods of the Southeast.
Haven't been able to shoot it yet. It was dark last night, by the time I got home from my 150 mile trip to get the rifle..., and it's raining pretty heavy now.., but I'll get a few shot out of it pretty soon, and tell how it shoots.