The 3G is the only competition rifle I have fired, everything else has been stock. Now that I have my oh-so-impressive credentials identified, I concur with previous folks that the comp sucks and should be replaced almost as fast as you replace the factory sights on a Glock. I put a Rolling Thunder comp on my Stag and tuned it as per Jesse's simple instructions on the Brownells website and there is zero movement of the muzzle when I fire. I personally love the Geissele trigger because it lets you balance speed and accuracy wonderfully. Lifetime barrel replacement if you wear yours out is something I hope to be able to take advantage of. I have a load that put five rounds in an inch at a hundred yards, with three of them going into a half inch, fired off of a sandbag rest and that was before I tweaked the powder charge. I should get better results once I finish refining things.
The weight can be a blessing and a curse. A 9.5 pound rifle and optic setup is good if you are shooting a course that will require long shots, but I imagine it could be a bit of a hindrance if you are in a smaller bay that requires fast swings. The stock is comfortable but a bit big and I plan to eventually put one of the skeletonized stocks on it.
Overall, it's a more than suitable 3 gun rifle after replacing the comp in my not so humble and mostly flawed opinion.