The two I found are:

Guardian: Outcast wrecks around the Unknown jumphole in Omicron Alpha.
Wild Fire: Bounty hunter wreck near the Sigma-19 jumphole in Omicron Beta.

They both do around 1000 hull damage and 600 shield damage with a 2.00 refire rate and 250 energy consumption.

I found two GUARDIANS in the Omicron Gamma system, on a wreck called Vengeance that was right next to the jump hole from Omega 41 (close enough that it was on my scanners as soon as I came out). I also found two JADES and two DIAMONDBACKS on wrecks that were just called something like Old Rhineland Imperial Fighters in the Simga 13 system. I was surprised to find such weapons there, because you pass through that system quite early on, and presumably you can get those weapons when you first go through, although I haven't tried. And of course, they would be useless to you at that stage There could well be more of those ships in that system, as it's supposed to be the graveyard of a huge battle. I haven't really explored it thoroughly. Finally, if you want more, I'm pretty sure there is a thread here that gives the location of all the level 10 weapons

Here's a tip. Nomad Engery Blasters (636 Hull damage), and Nomad Energy Cannons (800+ Hull damage). (unfortunatly I can't remember their shield damage)Now, you might scoff at getting these at first when compared to other lvl 10 weapons that do 1000 damage to hull, but here is something to consider, and should be your deciding factor: they use 0 (yes, that's ZERO) engery!

4 Nomad Cannons, and 2 Tizona Del Cids (which, btw, hit 1222 to shields) mounted on a Titan, and any group of enemies are toast in a matter of seconds.

Where oh where are the Nomad weapons to be found?

Go to Omicron Aplha or Gamma, controlled by pirate factions. There are ship graveyards near unknown jump holes where weird organic things will attack you. Inside one unknown system are two planets, and the other has a strange ringed sun and unusual location.

I like 2 Nomad Cannons, 2 high damaging and cool-looking class 10 guns, and two energy efficient level 9 blasters.

u can get 2 DIAMONDBACKS in sigma 13 and 2 JADE in the same system. the 2 wrecks r lpcated aorund a junkers base and the new berlin jump hole.