BCM Low Profile Gas Block barrel diameter question for DOMINION ARMS DA556

[zjy412]

Hi, I am going to buy a BCM Low Profile Gas Block, but there are two different: one comes with 0.750" barrels and the other one comes with 0.625" barrels.
My rifle is DOMINION ARMS DA556 and the barrel is Lightweight C8-style 14.5" barrel
So which one I should buy?
Thanks.

 

[hbean]

Take a ruler put it across your barrel and see how thick it is, you don't have to precise.

 

[hicaliber]

someone you know must have a pair of callipers you can borrow?

 

[greentips]

It is probably easier to get someone to cut down the Chinese gas block. Guaranteed fit.

 

[zjy412]

I did and get the number, thanks. Posted this question is just for double check.