User blog comment:Willbachbakal/Multiplayer Weapons: Railgun/@comment-1330314-20100522072451

The magnetic chamber increases the size of the field which holds the slugs, giving space for another one. The Energy Siphon means you can fully top up your EVE in the middle of combat. Also, the gun's accuracy only gets decreased to Rivet Gun levels, so it's still very accurate. Finally, this is a handheld railgun, so it works differently compared to the big guns.