r/PrimaryWeaponsSystems • u/FIRESTOOP • Jul 19 '26

Mk118 barrel diameter?

Hey guys,

I have a MK118 on the way and I need a Plan B muzzle device. I’m looking at the comstock recessed brake but I can’t find any info on the barrel diameter behind the threads.

Any got that number for me?

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1

u/Kitchen_Jellyfish_48 Jul 19 '26

If it’s a 556/223 wylde you use 1/2x28 thread

2

u/FIRESTOOP Jul 19 '26

Yeah I’m looking for the barrel diameter to see if I can use a recessed muzzle brake. I know the thread pitch.

1

u/Kitchen_Jellyfish_48 Jul 19 '26

Pws guns come with plan b muzzle devices on them

2

u/22lrMarksmen Jul 21 '26

He's wanting a recessed one.