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i recently sbr'd my scar 16s to a 10" cqc length barrel. just wondering what a good starting point for gas screw sizes are.
 

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Realize that if you bought a FN OEM CQC barrel, it should already have a proper sized screw installed. But if you had the 16" barrel cut down like I did, you'll have to find the right size but that thread should give you a starting point.

It'll also depend on what ammo you shoot and what you want it to function with.
 
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