Try the Reflex Rail its an even better jump up. I've a 2011 and its been a great little backup gun to my NT11.If you are still thinking, just to let you know down at my local site where i used to play with people that had bought these second hand proto rails and when i used one it was an amazing improvement on my slg i bought. Although i love the slg and it was a nice new entry level gun they bought the rail for a little more and it shot so much better. I really recommend that proto rail!
rental markers -- so reliable but not that powerfull is that what your saying?