Don't.
I know you're like me. You see this gun and it's description and think: 'Hey, a weapon that shoots grenades, I should unlock this! This can't possibly svck!'. WRONG. It's all a lie folks.
The thing shoots GRENADES. Or, what Crytek thinks grenades should be. Might as well be shooting water balloons at the enemy. To actually kill someone with this thing you have to somehow shoot it so it banks off the ground under their feet, and ricochets up into their anus before detonating. I swear I would be more effective on the battlefield with this weapon if, instead of firing grenades at the enemy, I just threw the damn thing at their heads. That would do more damage.
And if you are looking for some cool attachments, SORRY, nothing to see here folks.
The thing svcks. Big let down. You have been warned....
Aaaaaannnnd cue the kids saying 'Oh well I had a good game wiv it brah pwned ppl lollll'-->Bullsh!t.
Bye!