RCOM HUD Effects
Here are some screenshots of the hit and grenade indicators in RCOM. These are applied in addition to the animation effects currently in RCOM v.1.0.6 Beta. These were done by Predator_828, who is part of the RCOM team.
The final RCOM HUD will also introduce health and stamina status without "life bars," as commonly known from the Call of Duty: Modern Warfare series. Screens of that will be shown once development on the HUD is closer to final. :)
Grenade Hit Indicators
Here is a screenshot of the grenade hit indicator, along with the gunshot hit indicators. The grenade indicator is a gray grenade (no longer yellow), which you can see in the top right portion of the screen.
Bullet Hit Indicators
Here are some screenshots of the HUD indicators that display when the player is hit by gunfire in RCOM.