The splinter turret or the binary. I can't use them as effectively as ANYONE else. When i get my hands on one i might as well be wearing a blindfold. Also grav hammers.
Grav Hammers and Binaries... If i get one as a random weapon, i give it away.
Kinda surprised to see an Achilles wearer admit he has trouble with these. Let me give you a few tips dude. These ones worked for me and helped me out tremendously with these weapons. When you have a hammer always sprint with it. Run up just until you see the two <> signs on your hammer hud/ crossairs light up red. Once they are red just hit the melee bumper and you will lunge and kill them. The most important thing with the binary rifle and any sniper weapon is to aim before you fire. Don't panic and end up shaking the crossairs and end up missing. Just be cool, and for a sec and shoot. Slow is smooth and smooth is fast. As for the splinter turret it's pretty much aim jump and shoot. Not much more I can suggest there.
My problem with the BiRi stems from the need to hold it ok my enemy for so long. With any other sniper i can just move my crosshairs
across an enemy's head, pull the trigger at the right time, and bam, he's dead. But with the BiRi I have to zoom, hold, fire, and keep holding. All the while giving away my position to everyone on the map.
The grav hammer, on the other hand... I dunno, i love the sword buy just can't get the same effectiveness out of a hammer.
As for the splinter turret, I'll try jumping!