Which railed gas block to choose

[Mr. Nobody]

I'm debating on these two.
One has removable side and bottom rails while the other is one solid piece. I desided to use a front flipup sight over a A2 standard sight.

[hi5]

I'd vote for the 1 pc, no benifit to removable rails. What's the cost difference? Where did you find the first one? That would go well with my sons AR build.

[Mr. Nobody]

I'd vote for the 1 pc, no benifit to removable rails. What's the cost difference? Where did you find the first one? That would go well with my sons AR build.

Both are $24.99 shipped. Lol on eBay. Don't see a benefit from a NAME brand gas block. 2500 people have bought the top one (w/o removable rails) and were pleased with the purchase.

Yes I understand if a gasblock moves the AR turns into a bolt action type rifle. Due to my build using a freefloat hand guard tube these are my choices.