+7.5-15% Weak Spot Damage. Weakspot Kills also ignore Enemy Hit Mass.
Target receives 1-4 Stack(s) of +10% Damage if already Staggered. Lasts 5s.
Your Grenades stick to Ogryns and Monstrosities. +6-15% Damage vs Ogryns and Monstrosities
+1-4 Bleed Stacks from close range explosions.
Not a new build but it's always fun to see one in a wild. You can replace lucky bullet perks that you don't like with Hard Knocks.You can replace Toughness Damage Reduction with The Best Defence.Don't worry the Rumbler just needs a bit of creativity, you ALWAYS have an angle on the enemy. Shoot the roof above them, or the wall beside them. Just make sure your grenade lands on their side of cover. The grenade will bounce and knock the shooters prone, or at the very least stagger them off balance. In fact you can knock most everything over if the boom lands close enough, even enemy Ogryn!