12-15-2022, 04:19 AM
I have tried the KaliKey on several of my Grendel AR's and it doesn't work. After firing, it won't unlock the bolt. I've tried several carrier/bolt/upper combinations in my Grendel's, but I can't seem to get it to work. It works fine on my 300 blackout. Anyone have any ideas on why it sticks on my Grendels but not on my 300 blackout AR's?

