(First post!) I got insane AR fever last week, and went in to buy one. What should I see on the shelf but exactly the set-up I've always wanted: a Bushmaster carbine with the M4 upper (with the muzzle brake that's on the Bushmaster M4 from the catalog), but with an A2 stock!
Son of a gun! It's a sign! I went home with said carbine (took it to the range the next day and I can tell you how pleased I am with the carbine), and I'm very happy.
But what is it? The carbine is just marked "XM15 E2S" like all the others, and I don't see this model listed on Bushmaster's site. Is this a new configuration, or did I just happen to luck into a short-run that had precisely the features I've always wanted?