You're talking about the MOE rifle length ones? I told my buddy about them (the dude who actually owns this thing), but he wanted to go classic styling.
I've shot this rifle before, back when that lower was an M&P sport lower with a carbine RE (So think C7A2). It ran, but I didn't hit shit because I did not finely adjust the sights. Live and learn....but it was fun. The 20"s are growing on me personally.

