Looks good Evile,Should make for a good shooter I would think. As far as the gas tube being staked? It looks like to me your gas block is a clamp up type with two bolts and split? if so tighten up those bolts and it won't go any anywhere! I have a similar bock on mine and mine has three set screws, I thought about getting a split one that clamps to the barrel, but instead I drilled dimples in the barrel to match my set screws, worked great.
I have one that looks similar to yours, I can get pictures posted in here but it is a url and you have to copy and paste or highlight it and your browser will take you to it. That brings me to an off subject but will make it short, how do you post a picture like yours? like I said from photo bucket I can put here, but you have to paste and copy to see it? Anyway, here is my set up still have more to do.
http://i124.photobucket.com/albums/p6/eddieirvine/100_1349.jpg
My barrel was 24 inches and over an inch on the O.D now it is .875 and a bit smaller in places. Also I cut it off to 18 inches and re crowned the barrel, it shoots very good, under one inch at 100 yds with my reloads.