Not a drop in...it’s free float so you need a barrel nut wrench. You will also need to remove the front sight block and delta ring/end cap...since you are removing the FSB, you will also need a new gas block. Sounds like a lot but it’s really pretty easy. YouTube is your friend here....
PS: And since it’s a free float, you are not restricted to carbine length..you can add a few inches as long as your muzzle and any ports are clear of the rail.