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Trying to get aftermarket gas block

418 Views 2 Replies 3 Participants Last post by  AgedWarrior
I have a factory new sig m400 elite. I am trying to order an adjustable gas block, but im not sure about the right size and fit for my barrel, I cant find any specs online, and there was no markings on the gas block for specifying, should I just get a .750?
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If unsure the best way is just to measure the barrel diameter with a set of calipers where the gas block sits. Also keep in mind the other major factor when ordering a gas black is to make sure it will fit under whatever hand guard you have if it goes under the hand guard.. They are not all the same.
Agree with square target2. Both measurements are important. If you don’t know, measure. If you don’t have calipers, buy some; there are numerous available at reasonable prices.
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