The Situation:
My current SBR (300blk) is shot suppressed and unsuppressed equally and I really like not having to tune or adjust the gas block. I want a 5.56 upper that is no longer than 10.5" but will also allow me to shoot suppressed/unsuppressed equally reliable.
I decided on the mk18 barrel length and gas system as that was designed to function regardless of suppressor use. Furthermore with the amount of r&d and t&e that went into it, I feel comfortable in terms of its overall reliability and function.
The Problem:
I cannot find ANY 10.3" or 10.5" barrels that have the NSWC spec .070" gas port or even the standard .063" (which I could open up). I just got off the phone with Daniel Defense who stated their 10.3" is a .086" port. I understand the purpose of the larger ports is to cycle less powerful ammo, but I think that will be way over gassed with a can attached.
The Plea for Help:
Does anyone have any leads on a 10.3-.5" barrel that has the smaller gas port I'm after?
Is my only solution to buy a longer barrel and have it cut down?
Can anyone chime in with their experience running 10.5 both suppressed and unsuppressed with a STANDARD gas block?


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(.147" is 5.56 spec if I remember right)
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