Yea I favour the Clark-RDX over the sentry as well. And if I know that there's only a few pieces of armor on a map, or that chances are slim that I'm going to run into armor, I'll pack the Clark-RDX. I know having the EMP nade is nice for that off-time you DO run into armor, but I'd rather have something I can use in all situations. The Clark-RDX is decent against armor -- I almost took out a walker with it by myself (engineer came when it was about 25-30%) Its not easy, granted, but its possible. If you have EMP nades you can't take out the armor by yourself in nearly any situation (now if you have godly weapon switching, perfect timing on the nades and are against a horrible enemy pilot...). It can also reach the top of those really big buildings like command-post in Cerbere Landing, letting you pressure any pesky enemies up there from a very safe vantage point (since they'd have to come to the edge to shoot the near 90* down at you, in which case your buddies will likely pick them off), and with the fairly large splash damage you could take out a beacon as well with a little luck... all from the ground. Its also a light area-denial tool since no enemy in their right mind is gonna run over that sticky bomb if its in front of them -- since it's gonna blow. Now this assumes (and I hate assuming) that the enemy detects your projectile and avoids it, but if they don't and run over it...you get a hit, and thats even better. Several people have mentioned that the Clark-RDX fills the same role as grenades, and while it may seem like this is the case, they are different equipment with different uses. Heres an example: You're defending Ruins on CampG and a couple enemies have gotten onto that second level; you could throw a grenade but since the ledge is so small you either need a lot of luck, awkward positioning or several seconds to gauge your throw; with the Clark-RDX you can just swap to it (which would take as long as it would to swap to your nade) pop off a few rounds where you want it, and do a happy dance as your enemy either falls to the ground or runs out of cover. A lot of the time you'll get the kill, since the enemy sees the explosive coming in and when it doesn't blow right away they think its a rifle-rocket that was poorly ranged -- yes they're gonna move so they don't get hit with the next clip, but their reaction is slower and they get hit by the delayed fuse either crippling or killing them. The main secret to the Clark-RDX -- and I've only just starting to really use it -- is in the aiming. I like the Clark-RDX better than a grenade because I, personally, am more accurate with it. I can place the charge exactly where I want it more often than with a nade which requires a greater angle to go an equal distance, which causes you to momentarily move your target out of your direct focus.