A grenade is the best way to make your indie action war flick more realistic, but anyway you try it, it's not going to be completely "realistic". You need a prop grenade, and you can eerily make it yourself out of cheap household materials. Watch this video tutorial to learn how to make a movie prop grenade.
ParkersTutorials is a DIY filmmaking show for all of your novice moviemakers at heart. Parker shows quality film tips and tricks, including special effects, visual effects, cheap movie props, cinematography help, and tons of SFX for anything film. Backyard cinema doesn't get any easier than this. Parker's Tutorials is also available on Facebook.
Used with permission from Incompetech