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Muzzle thread size


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3 hours ago, Jeffo1960 said:

Was wondering what is the best size thread for a, .900" dia barrel for a muzzle brake, sorry if I have posted this in the wrong section, thanks in advance. 

 

 

The best size is always the biggest you can fit while providing an adequate shoulder to mate against. Why? because the more material you leave around the crown the longer it will take for shots to start wandering. Thats important on a barrel that has been left at 0.900"

If your brake has a spigot then the shoulder is not required as the spigot will line things up and so you could go bigger.

On a .900" muzzle the most common large size would be M18x1 or M18x1.5, if it was being custom made you could go M20x1 and with a spigot M22x1

The person doing the work for you should be able to advise you similar, hopefully.

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