Set screw vs clamp gas block for AR

[GTSteve03]

Continuing on my upper build quest. In real-world practical application of a low-pro gas block being installed completely covered by a handguard, is there any difference between:

1. Set-screw gas block installed with the barrel dimpled correctly across from gas port.
2. Clamp-on gas block.

I've heard theory that the clamp is stronger or less likely to cause barrel distortion, but wanted to see you guys' thoughts.

 

[Bushwhacker]

Is your barrel going to be dimpled for your block?

 

[freedom]

Who says the clamp is better?

 

[GTSteve03]

1. Set-screw gas block installed with the barrel dimpled correctly across from gas port.

Is your barrel going to be dimpled for your block?

 

[GTSteve03]

Who says the clamp is better?

http://www.m4carbine.net/archive/index.php/t-6633.html

 

[Bushwhacker]

My fault... I guess I'm an idiot for not seeing that... So take what I say with a grain of salt but either method is perfectly fine but I would go with option #1 on a dimpled barrel.

 

[ReservoirDawg10]

Set screw style and dimple the barrel. You want a mechanical lock.