Warzone req questions

I unlocked an assault rifle with a zoomed in scope i think its called recon something, requires req lvl 8 I believe, but every warzone game I’ve played our team never gets above lvl 7 unlocks. I have played about a dozen warzone matches.
Andbody know what gives?
I also can’t use my lvl 8 mantis ><
Secondly I have yet to unlock a dmr for warzone. I freaking love that gun. Has anybody been lucky enough to unlock a dmr for warzone yet?

I’m against spending real money on req packs and will not do it.