Board Thread:General Nerf discussion/@comment-26431461-20200614204406/@comment-27306930-20200617222900

Yes, that checks out. Since the Sledge fires three darts at a time, it's probably mechanically simpler for the AR to interface with the shell, rather than the darts. Or one specific dart. Plus there's the extra space created by the recessed design of the bottom of the cylinders.

The Strongarm AR on the other hand, is a funny animal. It moves side to side and back and forth to accommodate the cylinder rotation. The Sledge probably only needs to move forward and back I'm guessing. Sorry I don't own one.

But Hasbro's MO has traditionally been to keep things simple. So it doesn't surprise me they didn't try to get the AR pin/tooth/finger way up inside the shells.