If you want something for in case you're below your MED then you might be able to use the Crosman Airmag C11. It runs off CO2 and shoots at a relatively low 360 FPS, and according to the BBBastard Minimum Safe Engagement Distance Calculator you're looking at an MED of about 10 feet.
Apparently the C11 isn't that bad and I believe that some players run them but you'll have to wait until an owner drops by and can confirm this.
However, still ideally you'd be running 350 or less if you're wanting no not hurt the other player and you're engaging at low distances like from around a corner or doing a transition from outdoor to CQB or engaging in a FIBUA site.
Keep in mind that you can always mercy the other player as well (within reason) you don't always need to hit them.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE