Gunsmithing Mega MKM keymod rail, adj gas block that fits?

[davsco]

Trying to do a 224 Valkyrie build and have a Mega MKM520HA upper and keymod rail listed with a 1.6" inner diameter, though at the 12 o'clock position it seems there is a little more room. Anyone know of any adjustable gas blocks (.875) that will definitely fit under this rail? thanks!!

 

[GH41]

Trying to do a 224 Valkyrie build and have a Mega MKM520HA upper and keymod rail listed with a 1.6" inner diameter, though at the 12 o'clock position it seems there is a little more room. Anyone know of any adjustable gas blocks (.875) that will definitely fit under this rail? thanks!!

I would contact Rainier. They sell MEGA and numerous .875 adjustables. They would be as qualified as anyone to answer your question.