Sabre Defence question

[2_speed]

Here's one for the horde. I have a 20" Sabre Defence barrel purchased in 2010 before they got into trouble with the Feds, etc. I'm wondering if anyone knows what the muzzle thread size & pitch is for this one. It has a VLTOR A-2 type birdcage now & I'm toying with putting on a linear comp to push the sound forward. I would like to know what is is before I start wrenching on it. I almost hate to mess with it because it shoots great as it is.
Thanks,
Tom

[ah1whiskey]

it uses the same size as AAs 9/16-24 .

there are converters to allow 5/8" and vice versa-- a regular-15/m16 FH device can be tapped out to this size easy as well--

[2_speed]

Thanks for the info.
Tom

[2_speed]

I'm not really sure I want to make any changes to this one.
I probably will use a linear device on the Faxon bbl when the group buy comes through.