Ehpro Kfl+ afc screw size?

[The M4n C4nn0n]

Does anyone know what size the grub screw is? I've lost mine and it doesn't come with replacements. Unfortunately the tobeco ones don't fit or I'd be golden.

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[Varelse]

Same boat. I have some cotton shoved up there but its still is too open. Fasattech had them but have been out for awhile.