I've been thinking of adding a power to DnD4e as a basic maneuver that all players can do. I'm not certain yet if this power should be regulated to only BRA (Basic ranged attack) or if it's ok for it to work on all attack powers. The basic intention here is Move Attack Move given to Ranged characters to compliment the Charge ability that Melee characters get.
The details of the power I'm thinking of is as follows:
Run for Cover
Effect: You may move but not shift up to 1/3rd your normal move rate and then make a Basic Ranged Attack. After your attack, you may then again move but not shift up to 1/3rd of your normal move rate. After using Run for Cover, you may not do any other action other than free actions.
Do other powers or feats already allow you to do this? (and thus would be unbalancing a feat choice)
Does it break any other combat mechanic by allowing this sort of action?