Well M4 Metal MRT Blaster
This is a really durable blaster. It's a great size, and is powerful enough on its own.
This one hasn't let me down, great performance.
After having sub $300 blasters, I thought it was time that I would take the next step and truly buy something of high quality for the field. I've compared it to my prized M4, which I've personally upgraded all the internals. The MRT has surpassed it, not just in performance, but also the feel of realism with it's nice weight and trigger response. I don't even care that I missed out on the Easter sale by one day, it's still worth the full price that I paid for.
The absolutely only con is the plastic mag it comes with. It is a bit embarrassing when I show it off and the light weight cheap plastic mag gets attention. Mag still does it's job, I'm just being picky