I did notice the factory magazines came with some "different" looking followers.
The "skirted" followers are to keep your frame from getting abused from the more common "folded" follower in 1911 magazines.
From the pictures I've seen of aluminum framed guns, the standard follower with the sharp edges can really mess up the frame.
Wilson 47D mags have a skirted, plastic follower, and should work well in your gun.
S&W actually ships them with some guns.
The best options seems to be Chip McCormick Powermags, with Tripp Industries followers and springs installed.
That's how I'm planning to equip my gun.
I picked up the stainless 1911SC back in December.
(Just after they quit making them.
)
So far mine has fed Win. hollow points, aluminum CCI fmj, Wolf fmj, Win. fmj, and PMC fmj.
I sold my full sized, stainless S&W 1911 so I could buy the lighter Scandium gun for CCW.
(I still miss my big 1911.
)
I only bought each of my S&W guns after reading all the owner reports I could find.
What I found was an overwhelming number of satisfied S&W 1911 owners, both of steel and Scandium guns.
S&W may sell less 1911s than Kimber, Springfield, etc. but they also seem to let fewer lemons out the door, from what I've found.
(And everybody lets an occasional lemon out.)