Okay /pccg/, I have a CMMG Mk9 lower and am in need of an upper
I want something that I can eventually put a can on, so 8-10" barrel length with common thread pitch is preferable
I also want a flat top for my fancy optics, no carry handles here
The handguard can be almost anything as long as it's not blocking the future can or keymod
I also want some sort of recoil system softer than straight blowback, any recommendations?