Bullet Bomber
When shot the bomb goes flying like a bullet good for far away attacks
Direct Hit takes away 100 damage

actual grenades! he has an army looking launcher, and the grenads have a bit more blast radius and damage, but a slower explode time

What he's after is visual reference and ideas...

If you want something "realistic", here are some visual ideas

#1 How about something like the Sawn-Off M79?:
http://img.redwolfairsoft.com/upload/product/img/caw-lch-m79so-l.jpg

#2 XM148
http://weaponland.ru/images/granata_1/usa/XM148.jpg

#3 M69
http://www.rap4.com/images/grenade_launcher/M69_Grenade_Launcher8.jpg

I've wanted to do those myself, alas, no time with all the Smissmas ideas I have!

Play around with those, try and adapt their styles perhaps.

Good luck!

Chaos mine. it shoots like a regular nade launcher but when it blows up it will send out bullets flying in all directions